– He looks as if he _____the answer. --- He has.
Only after Mary read her composition the second time ________ the spelling mistake.(2012·天津)
Never before ________ seen anybody who can play tennis as well as Robert.(2012·江西)
Every day________a proverb aloud several times until you have it memorized.
It was with the help of the local guide ________ the mountain climber was rescued.
It was only after he had read the papers________Mr.Gross realized the task before him was extremely difficult to complete.