He must have finished the work by the end of last month, _______ he?
| A．mustn't | B．hadn't | C．didn't | D．hasn't |
Evidence obtained from observation and experiment is often used to _____ a scientific theory.
| A．confirm | B．confine | C．conform | D．conceive |
Jack is good, kind, hard-working and intelligent. _____, I can't speak too highly of him.
| A．As a result | B．By the way | C．On the whole | D．In a word |
You can’t guess what difficulty I had_____ your home.
| A．find | B．to find | C．finding | D．found |
As a result of the strong sun, my new dining room curtains _____ from dark blue to gray within a year.
| A．faded | B．fainted | C．paled | D．diminished |
I asked the tailor to make a small _____ to my trousers because they were too long.
| A．change | B．variation | C．revision | D．alteration |