Cho hình chóp SABC có đáy ABC là tam giác vuông cân tại B, $SA\perp \left(ABC\right)$, AB = a. Biết góc giữa đường thẳng AC và mặt phẳng $\left(SBC\right)$ bằng $30°$. Thể tích khối chóp SABC bằng

Có bao nhiêu số phức z thỏa mãn $\left|z\right|=\sqrt{5}$ và $\left(z-3i\right)\left(\overline{z}+2\right)$ là số thực?

Cho hàm số $f\left(x\right)=\left\{\begin{array}{l}2x-4\text{\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}khi\hspace{0.17em}}x\ge 4\\ \frac{1}{4}{x}^3-x^2+x\text{\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}khi\hspace{0.17em}}x<4\end{array}\right.$. Tích phân $\underset{0}{\overset{\frac{\pi }{2}}{\int }}f\left(2{\sin }^{2}x+3\right)\sin 2x\text{d}x$ bằng

People go to a ___ if they want to send a letter abroad.

Dad hurt his back, but he got something from the ___ to help with the pain.

Let’s get some plants from the ___ for Mum’s birthday.

1. Choose the word /phrase (A, B, or C ) that best fits the blank space in each sentence

I want to buy a couple of magazines, so I’m going to the ___.

2. LISTEN to audio 3.09 about how people spent there holidays. WRITE T (True) or F (False) for the following statements (1-7.

Hilary is 50 years old.

I. LISTEN to audio 3.03 and MATCH the tourist attractions (1-4) with their correct countries (A-E), there are TWO countries that you DON’T NEED.

II. Choose the word or phrase among A, B, C or D that best fits the blank space in the following passage.

China’s child labour is a huge problem, and there is (1) _________ evidence that it is increasing in China. 2. Although there is no official figure on the number of children working in China, it is (2) __________ by many that of the 10 million children out of school, over 5 million are working in factories. It was reported in Sichuan, China’s most (3) __________ province, that 85% of children who drop out of school are working elsewhere. Even in some less populated (4)__________ provinces, over 20% of the work force is made up of children. Also, in the last few years, the rate of children kidnapped has increased rapidly. It is believed that the children kidnapped are sold off to factories to work. For example, in 1994, about 48 Chinese brick-shop-workers kidnapped over 100 children. It is known that forty of those children were forced to work 10 hours a day, but with no (5) __________. China’s child labour cannot be overlooked.

I. Read the text and FILL IN THE BLANKS behind the situations with A (Andrew) or B (Joe).

The best job in the world???

A. Back in 2012, Andrew Johnson planned to apply to a film school after graduation, rather than look for a job. But then his dad noticed an advertisement for a job with toy manufacturer Lego. Andrew, who was already a Lego fan, sent in an application. It included a video of himself making models. The company loved it and invited him to participate in an unusual interview. He had to compete against seven other finalists in a model-building test. Andrew won. As a result, he was employed at Legoland Discovery Centre in Illinois as a Master Model Builder. “Lego was just a hobby, but now I can do what I love and get paid for it,” said Andrew happily in an interview.

B. Some film providers like Netflix employ people to watch new films and TV series, then ask them to make a note of what type of film it is (horror, rom-com, etc.), what age group and type of person might like it. The film provider can then recommend it to their members. Joe Mason finished his degree in film studies about two years ago and didn’t know what to do next. Then he read an article about film taggers. The job was so fantastic, and he wrote to Netflix. At first, they weren’t interested, but when Joe told them he speaks fluent French, they gave him a job. He watches French films and TV programmes. “It’s a great job because I can have flexible working hours,” said he. The only problem with the job is that Joe can’t choose what he wants to watch.

Have flexible working time. ___________

Don't sit on that bench. I ______________.

“The doorbell is ringing”. - “OK, I______________ it.”

Look at that truck! It__________________ .

__________ you going to cook dinner?

II. Choose the word /phrase (A, B, C or D) that best fits the blank space in each sentence

Natalie is __________ have a baby next month.

When Sharon ___________ (get) to the bus stop, she realised that the bus ____________ (leave) a few minutes earlier.