Species become extinct or endangered for _______ number of reasons, but _______ primary cause is the destruction of habitat by human activities.

A. a/a B. a/the C. the/a D. the/the

It is necessary to be careful _______ your career.

A. when choosing B. when you will choose

C. when you have chosen D. when you chose

_______, he could not lift the trap door.

A. As he was strong B. Strong as was he

C. As strong he was D. Strong as he was

 What a (n) _______ behaviour! He went straight into the line.

A. shame B. shameful C. ashamed D. shameless

_______ all the hard work they put in, the students got good exam results.

A. As a result of B. In compared with C. According to D. In addition to

Sarah and Kathy are talking about bad habits of children.

Sarah: “Children under ten shouldn’t stay up late to play computer games”

- Kathy: “_______”

A. You are absolute right. B. Surely, they shouldn’t.

C. Yes, I share your opinion. D. I don’t quite agree with you.

Peter is going on vacation next week. Today, he drops in on Tom before he travels to American.

Peter: “Where do you suggest I stay?”

- Tom: “_______”

A. Let’s stay at the Hilton! B. I suggest you to Hilton.

C. I prefer the Hilton. D. I recommend the Hilton.

The purpose of the United Nations, broadly speaking (A), is to maintain peace and security (B) and encourage (C)respect for human rights (D).

Keith had so interesting (A) and creative plans (B) that everyone wanted (C) to work on (D) his committee.

A. sounds B. obstacles C. situations D. secrets