Over one thousand passengers remained_____ on trains for hours without air conditioning because of power failure on the railway,
| A．sticking | B．to be stuck | C．stuck | D．having stuck |
_____ the government agrees to give extra money , the theatre will have to close.
| A．Until | B．Unless | C．Since | D．While |
----Iam sorry to have ____ too much of your time.
----That's OK, and I am glad to help you.
| A．taken up | B．taken on | C．taken off | D．taken in |
Mary and her friends paid_____visit to _______Summer Palace yesterday.
| A．the; / | B．a; the | C．a; / | D．the; a |
It was back home after the experiment.
| A．not until midnight did he go | B．until midnight that he didn’t go |
| C．not until midnight that he went | D．until midnight when he didn’t go |
is believed that improvement in health care will lead to a stronger , more prosperous economy .
| A．As | B．That | C．This | D．It |