The two sisters are ________ different in character --- one talks a lot while the other is a girl of few words.
Not until he retired from teaching three years ago _________ having a holiday abroad.
Never before _________ seen anybody who can play tennis as well as Robert.
The manager was so satisfied with allI had doneshe gave me a promotion.
You have to wear a helmet and a life jacket for protection, just ___ you fall into the water.
Wuhan lies _____ the Changjiang River and the Han River meets.