语法练习

1.If this fellow was imprisoned for but one week for so grave an offence, he ___ cheap.
A.got off
B.broke off
C.took off

D.passed off

2.He was looking admiringly at the photograph published by Collins in ___ with the Imperial Museum.
A.collection
B.connection
C.collaboration

D.combination

3.Radio Lichtenburg is ___ 24 hours a day.
A.in the air
B.on the air
C.by air

D.off the air

4.The republication of the novelist's most recent works will certainly ___ his national reputation.
A.magnify
B.enlarge
C.strengthen

D.enhance

5.Without a(n) ___ passport a tourist is forbidden to enter a country.

A.operative
B.effective
C.valid
D.efficient

答案详解

1.[A]【解析】get off意为“（罪犯）逃脱惩罚”；break off意为“打断，断绝，突然停止”；break off relations with sb.意为“与某人绝交”；take off意为“脱掉，模仿”；pass off意为“逐渐消失，停止”。

2.[C]【解析】collaboration意为“合著，合作”；in collaboration with意为“与……合作”；collection意为“收集”；connection意为“联系”；in connection with意为“与……有关”；combination意为“组合，结合”；in combination with意为“与……联合，与……结合”。

3.[B]【解析】on the air意为“广播中，（无线电或电视）播送中”；in the air意为“（某种情感）流传开的”；by air意为“乘飞机，空运”；off the air意为“停止广播”。

4.[D]【解析】enhance意为“提高，增加（吸引力、力量、价值等）”；magnify意为“放大，扩大，夸大”；enlarge意为“（使）扩大，（使）增大”；strengthen意为“加强，巩固”。

5.[C]【解析】valid通常指证件等合法有效的；operative指法律、法规、规定等有效的；effective常指方法或措施有效，强调能达到预期效果；efficient可指人有能力或指方法有效，强调通过最短时间和最少精力达到预期效果。