请阅读以下10个句子，然后从方框中选择最佳选项完成句子。每个选项限用一次。

A. normal       B. available       C. grow up       D. prepare for       E. fall down F. hang out       G. hear from       H. be able to       I. hundreds of       J. keep... to ourselves

【小题1】—Did you have fun visiting the car factory?
—Sure. It’s so amazing to see ________ robots working there.
【小题2】Nancy feels very unhappy because her parents don’t let her ________ with friends on school days.
【小题3】We shouldn’t ________ problems ________ because sharing them with others makes us happier and healthier.
【小题4】This robot can help us do some ________ things, like opening the door and getting the newspapers.
【小题5】Jim has to ________ the coming monthly test, so he can’t come to the party.
【小题6】I didn’t ________ my sister two days ago. She said everything went well in her letter.
【小题7】I want to have a talk with you when you’re ________.
【小题8】When children ________, they have to learn how to take good care of themselves.
【小题9】Jack and I won’t ________ finish the whole work in such a short time, so we need your help.
【小题10】If buildings ________ with people inside, the snake robots can help look for people under the buildings.