Rewrite each sentence, beginning as shown, so that the meaning stays the same.

This is the best essay I have ever written.

A. Never have I written such a good essay before.

B. Never had I written such a good essay before.

C. Never have I written such a good essay.

D. Never have I written as a good essay before.

The ………… arises when Jack and his parents have considerable disagreement on his choice of university.

The US president Barack Obama ______ an official visit to Vietnam in May 2016, which is of great significance to the comprehensive bilateral partnership.

Most important, I can quickly either start or end an online relationship whenever I want.

We invited a pop star onto the chat show, but he didn’t turn up.

There is a fault at our television station. Please do not ................. your television set.

I now regret spending too much money on clothes.

Margaret: “Could you open the window, please?” - Henry: “_______”

This ring is only made of plastic so it’s quite ............. .

You really saw a UFO, _________?

Identify the one underlined word or phrase that must be changed for the sentence to be correct.

Every candidate under considering for a federal job must undergo a thorough medical examination.

Were it not for the money, this job wouldn't be worthwhile.

...... behalf of the committee, I'd like to thank you for your generous donation.

I can’t believe how cheap these shorts were. They were a real............... !

We all wish to create a friendly and supportive environment ________ to learning.