.Don't have your children _____ for hours reading books in _____ dark a room.
| A．sitting; so | B．sit; such |
| C．to be sitting; so | D．to sit; such |
It is shown that men have as women do on average while driving according to recent statistics.
| A．twice as many serious accidents |
| B．serious accidents as twice many |
| C．twice serious accidents as many |
| D．serious accidents as many twice |
Not until the train pulled into the station that his suitcase was gone.
| A．had he found | B．did he find | C．he had found | D．he found |
The news came as no surprise to me . I ____ for some time that the factory was going to shut down .
| A．knew | B．know | C．have known | D． had known |
However difficult you find to arrange your time, it will pay off in the long run.
| A．this | B．one | C．it | D．that |
—Has Mr.Tom White arrived ?
---- Yes ,already . ______he wait outside or just come in ?
| A．Shall | B．May | C．Could | D．Must |