1．He ____________(犹豫) before he answered the question because he didn’t know what to say.
答案：hesitated
2．They had already been told the right way, but they chose to go in another ____________(方向)．
答案：direction
3．It was so cloudy that the top of the mountain was ____________(看不见的)．
答案：invisible
4．I have some ____________(怀疑) whether he is the best man for the job.
答案：doubt
5．The secretary lay ____________(醒着的) all night considering whether to leave or stay.
答案：awake
6．Every one of us should ____________ (表现) politely and think more about others.
答案：behave
7．He was in a state of ____________(精疲力竭) after the long journey.
答案：exhaustion
8．It is ______________ (粗略地) estimated that the project will be completed in 2020.
答案：roughly
9．The table was in a curious ____________ (形状) as both the top and legs were slightly curved.
答案：shape
10．All the students that work hard can ____________ (确定地) pass the final exam.
答案：definitely
