---- Don't you think it necessary that he _______ to Miami but to New York?---- I agree, but the problem is ________ he has refused to.

---- The woman biologist stayed in Africa studying wild animals for 13 years before she returned.---- Oh, dear! She _______ a lot of difficulties!

--- I don't mind telling you what I know. --- You ________. I'm not asking you for it.

eryone _______ not fire without the signal or you’ll be severely punished or even killed,” urged the commander.

--The room is so dirty.____ we clean it? ---Of course.

—Oh my god! You__ wear slippers to attend the conference． —I'm sorry I forgot there is a conference．

These achievements_______ without the contribution of Qian Xuesen, a key leader of the New China's nuclear, missile and so on．

—Did Jim come?—I don’t know. He _______ while I was out.

— Can I smoke in this hall?— No, you can’t. If you _____, please go to the smoking room.

You must be a student, ＿＿＿＿＿＿＿＿you? 

He had an expression of resentment（不高兴）, as if Martin＿＿＿a fool of him. 

I don’t think he＿＿＿＿＿＿＿ a new bike. 

She＿＿＿＿＿＿＿＿the film. She knows nothing about it. 

—— Do you still remember the day when we went to the Great Wall? —— I can’t remember it well, but＿＿＿＿＿＿sometime last autumn? 

—— Where ＿＿＿＿＿＿＿＿? —— I got stuck in the heavy traffic, or I＿＿＿＿＿here earlier. 

Oh, Janne, you’ve broken another glass. You ought ＿＿＿＿when you washed it. 

Let’s clean the classroom, ＿＿＿＿＿＿＿? 

—— Why do you make me do so? —— I am sorry that you＿＿＿＿＿＿＿＿do such a thing. 

The chairman requested that ＿＿＿＿＿＿＿＿＿＿＿. 

Tom＿＿＿＿＿＿＿show his exam results to his parents.