Not until he retired from teaching three years ago _________ having a holiday abroad.
A. he had considered B. did he consider
C. he considered D. had he considered
Never before _________ seen anybody who can play tennis as well as Robert.
A. had she B. she had
C. has she D. she has
The manager was so satisfied with all I had done she gave me a promotion.
A. that; which B. what; that
C. what; as D. that; that
You have to wear a helmet and a life jacket for protection, just ___ you fall into the water.
A. in case B. unless
C. though D. as
Wuhan lies _____ the Changjiang River and the Han River meets.
A. which B. wherever
C. that D. where
nation uses nuclear weapons will engage the whole world in war.
A. Whichever B. Whatever
C. No matter what D. No matter which
