— I don’t understand why you didn’t go to the lecture yesterday afternoon.
—I’m so sorry.But I my homework.
A.had done B. was doing C. would do D. am doing
I was ________ at the letter, which was _________ to my classmates..
A. amaze;amazing B. amazing; amazed
C. amazed; amazing D. amaze;amaze
---So you made it?
---Yes. It was so dark that we managed to avoid ________.
A. seeing B. to see C. being seen D. to be seen
Chengdu has _______traffic that all the schools in it had a day off on the first day of the Western China International Economy and Trade Fair (西博会)to avoid traffic jams.
A. such a heavy B. such heavy
C. so heavy D. so heavy a
To her joy, Della earned first the trust of her students and then _______of her colleagues.
A. that B. one C. ones D. those
If we _______ now to protect the environment, we'll live to regret it.
A. hadn't acted B. haven't acted
C. don't act D. won't act
