【单选题】
This technology has been ?around for a long time, but not until recent years _______ it in marketing.
③
businesses had employed?
④
had businesses employed
【单选题】
And there,almost________in the big chair,sat her little brother,who never had to be told to keep quiet.
【单选题】
Neither of them________the snake.
【单选题】
Ourclassroomis ______ largerthantheirs.
【单选题】
Look out ! That tree_______ fall down.
【单选题】
Itwasveryhotyesterday,butitis _______today.
【单选题】
He________listen to pop music,but now he________dancing.
【单选题】
________,the subject was always in my mind.
【单选题】
The greatest tragedy in life is not to lose too much,but care about too much,_________ is an important reason people are not happy.
【单选题】
You________return the book now. You can keep it till next week if you like.