18. It is ______ that he has passed the examination, and I am _____ I will pass it too.
| A．certain; certain | B．certain; sure |
| C．sure; certainly | D．certainly; surely |
8．---How did the interview go?
---Quiet well. Not so smoothly as I expected,_________.
| A．instead | B．either | C．though | D．as well |
7.---Mary, you didn’t show up at the meeting last week?
---No, I________, but my son had a sudden fever and I had to stay at home to take care of him.
| A．didn’t | B．was going to | C．had to | D．wouldn’t |
6．Newly-developed materials for spaceships can___________extreme weather conditions.
| A．hold | B．support | C．stand | D．Carry |
5．A good teacher is ________who is always doing things for the good of the students.
| A．that | B．those | C．the one | D．One |
4．The first time I met David in the Central Park, both of us felt that we________each other for ages.
| A．knew | B．have known | C．had known | D．Know |