Travel ………… into a huge industry in the last few decades.
A. has turned
B. is turning
C. has been turning
D. have turned
Đáp án đúng: A
Dịch: Du lịch đã trở thành một nền công nghiệp khổng lồ trong một vài thập kỉ gần đây.
He………. more concerned about his social status since he started working there.
Choose the correct answer to complete the sentence
You ……………… a lot since the last time I saw you.
Kathy …………….. for three different companies since graduating two years ago.