25、As we all know，there is ________electric field inside ________earth.
A．an；不填 B．an；the C．the；the D．不填；不填
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
23、- How often do you eat out ?
- , but usually once a week .
A. Have no idea B. It depends C. As usual D. Generally speaking
22、Stand over there you’ll be able to see it better .
A. or B. while C. but D. and
21、The wild flowers looked like a soft orange blanket__________ the desert.
A.covering B.coverod C.cover D.to cover
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
18、I was giving a talk to a targe group of people,the same talk I __________to half a dozen other groups.
A.was giving B.am giving C.had given D.have given
17、Fred,who had expected how it would go with his daughter,had a great worry________his mind.
A.on B.in C.with D.at
16、As the busiest woman in Norton,she made_________her duty to look after all the other people’s affairs in that town.
A.this B.that C.one D.it