25．Mr. Duncan raised an unnecessary question__________-he then failed to find an

题型：不详难度：来源：

25．Mr. Duncan raised an unnecessary question__________-he then failed to find an answer.

A．to which

B．for which

C．with which

D．by which

答案

解析

略

举一反三

27．Only when_______senior high school________to show a great interest in poems.

A．did I enter; did I begin	B．did I enter; I began
C．I entered; I began	D．I entered; did I begin

题型：不详难度：| 查看答案

31. It is in the year of 2010 a severe drought hits Yunnan province.

A．until

B．that

C．before

D．When

题型：不详难度：| 查看答案

32. ____from Adelaide to Darwin and you’ll observe some of Australia’s most beautiful landscapes.

A．Traveling

B．To travel

C．Traveled

D．Travel

题型：不详难度：| 查看答案

In the past, ice used to ______ used to ______ the air in a room.

A．be ;cooling

B．be; cool

C．being; cool

D．being; cooling

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According to the periodic table, still some elements undiscovered.

A．there seem to be

B．it seems to be

C．it seems that

D．here seem

题型：不详难度：| 查看答案