When she first arrived in China, she wondered what the future might have_________for her, but now all her worries are gone（2008·湖北）

You’re coughing badly, Martin. Why not give up smoking—Give up smoking Easier said than done, Amy. Once you ________ the habit of smoking, it is very hard for you to _______ .

Is that ________ pen—No, it’s ________ eraser.

Our class _______ 55 students at that time.

I’m busy in the evening, because there _______ lots of homework to do.