Scientists say it may be five or six years _____ it is possible to test this medicine on human patients.
| A．since | B．after | C．before | D．When |
The students of Class Two said that they had no difficulty ___ those sentences into English.
| A．to put | B．of putting | C．for being put | D．in putting |
The ship, ___ 1500 passengers , set off on its first trip on a cold winter day.
A. carriedB, carryingC. to carry D. being carried
Do you know if she is going __ him?
| A．to mary with | B．to marry to | C．to marry | D．to marry of |
---Do you mind buying some fruit for me? --___. I’ll be happy to help you.
| A．No, I don't | B．Yes, I do | C．Not at all | D．both A and C |
--Hello, is Mr. David in? ---_____.
| A．Who's calling | B．Who are you | C．I’m David | D．Are you Lucy? |