( )21. _______ by the air， the kite went up into the sky.
　　A. Pushing B. Pushed C. Having been pushed D. Having pushed

　　( )22.—The round bowl over there is a bit small， isn‘t it?

　　— _______.

　　A. So are the fish B. So the fish are

　　C. Neither the fish D. Neither are the fish

　　( )23. She couldn‘t take shorthand， _______ slowed down the work of the office.

　　A. that B. which C. it D. so

　　( )24. Was it last Friday ________ you met him?

　　A. that B. on which C. which D. when

　　( )25. _______ might fail in the exam worried him.

　　A. He B. That he C. What D. It

　　( )26.—I‘v got this really painful ear.

　　—How long _______ you?

　　A. does it bother B. was it bothering

　　C. would it bother D. has it been bothering

　　( )27.—I started to study， but then a friend called.

　　—That‘s no excuse ________.

　　A. for not studying B. not for studying C. not studying D. not to studying

　　( )28.—Why was he so hot when he got home?

　　—He ________.

　　A. was running B. is running C. has been running D. had been running

　　( )29.—There‘s been an earthquake.

　　—I know. At least a hundred people ________.

　　A. were to be killed B. are said to have been killed

　　C. said to have been killed D. are said to kill

　　( )30. You may invite _______ wants to go.

　　A. whomever B. whoever C. which one D. people