预约成功
词汇选项
1. Different hypotheses have been put forward to explain why UFOs exist.
A sentence
B comments
C conclusions
D theories
环球网校参考答案：D
8. I think she made a blunder by announcing it ahead of time.
A decision
B mistake
C promise
D plan
环球网校参考答案：B
9. He came back home, weary and fatigued.
A scared
B worried
C exhausted
D frightened
环球网校参考答案：C
