Was it in April, 1970China succeeded sending its first satellite into space? —Yes, that’s right.

Mary, I should tell you it is the third time that you________ your homework. [ ]

Let’s _________ some chicken. —Great! I like chicken.

If it_________ tomorrow, I’ll go birdwatching with my father. —–That’s a good idea.

Could you tell me some examination skills—-Sure. In the exam， the _____you are ， the____ mistakes you will make.