28、With a lot of mathematical problems __________, Marry went to bed.

A. solve              B. solved            C. solving       D. to solve

27、Never before__________ such a smoke in the room.

A. have I read      B. did I read         C. do I read   D. am I reading

26、We accepted the suggestion that ________ put forward by Jack at the meeting yesterday.

A. was                B. should be            C. would be          D. be

24、一Is Johnson on duty today?

一It ________be him．It’s my turn.

A．may not          B．won’t               C．mustn’t         D．can’t

22、Stand over there       you’ll be able to see it better .

A. or             B. while            C. but             D. and

20、In___________ review off 44 studies,American researchers found that men and women who ate six key foods daily cut the risk of___________heart   disease by 76%.

A.a; the             B.the;a         C.a;不填　　　　　　D.不填;a

19、A man cannot smile like a child,_________a child smiles with is eyes,while a man smiles with his lips alone.

A.so               B.but           C.and              D.for