1．―你看上去很紧张，发生了什么事？   
      —我不知道怎样回答这个问题。   
      You_______  _______.What happened? I don't know how to answer the question.
2．―你看上去很高兴，有什么事吗？  
      ―老师告诉我通过考试了。   
      You________  ________  _______very happy. What's the matter?   
      My teacher told me that I passed the exam.
3．我不知道是否应该告诉我妈妈真相。
      I_______  ________  _______I should tell my mother the truth．
4．我不明白为什么我的老板不让我去美国。
      I_______  _______  ________my boss didn't let me go to Amerlca.
5．起初，他非常害怕上学。  
      He was very________  _________  ________to school at first.

1.Lily想给她的朋友买一只玩具熊．
Lily            to         a teddy bear        her friend.
2.人们常给他们一些糖果作为招待.
People usually give them some                     a treat..
3.他们盼望很快回到家乡.
They are looking                             back to their hometown soon.
4.谢谢你组织这次班级旅行.
Thank you                 this class trip.
5.早上我通常去跑步半小时.
I usually                      for                             in the morning.
6.我真的不知道这个问题的答案.
I          don't know the                       the question
7.我们和他们一起做模型飞机怎么样?
What about             a           plane with them?