[单项选择]It ______ for two hours and the ground is too wet to play on, so the match has been put off.
A. has been raining
B. was raining
C. had been raining
D. has rained

[单项选择]It ______ yesterday. The ground is still wet now.
A. must have rained
B. was raining
C. rained
D. had rained

[单项选择]The ground is wet; it _____ last night.
A. might have been raining
B. can have rained
C. must have rained
D. should have rained

[单项选择]Since the ground is wet, it ______ last night.

[单项选择]The ground is wet. It ______have rained last night.

[单项选择]It______last night, because the ground is wet.
A. rain
B. must rain
C. must have rained
D. rained

[单项选择]The two students ______ for two hours, I wonder what they are talking about.
A. talks
B. are talking
C. talked
D. have been talking

[单项选择]The negotiation lasted for two hours, and finally we agreed ______ the con- tract.
A. at
B. on
C. with
D. to

[单项选择]Research findings show we spend about two hours dreaming every night, no matter what we ______ during the day.
A. should have done
B. would have done
C. may have done
D. must have done

[单项选择]

Two hours from the tall buildings of Manhattan and Philadelphia live some of the world’s largest black bears.They are in northern Pennsylvania’s Pocono Mountains, a home they share with an abundance of other wildlife.
The streams, lakes, meadows (草地) , mountain ridges and forests that make the Poconos an ideal place for black bears have also attracted more people to the region. Open spaces are threatened by plans for housing estates and important habitats (栖息地) are endangered by highway construction. To protect the Poconos’ natural beauty from irresponsible development, The Nature Conservancy (大自然保护协会) named the area one of America’s "Last Great Places. ’ Operating out of a century-old schoolhouse in the village of kong Pond, Pennsylvania, the Conservancy’s Bud Cook is working with local people and business leaders to balance economic growth with environmental protection. By forging partnerships with people like Francis Altemose, t
A. gain support from the local community
B. protect it from irresponsible development
C. make it a better home for black bears
D. provide financial security for future generations

[单项选择]The fire brigade arrived two hours later after the alarm was sounded,______it was too late to save much of the building.
A. then
B. when
C. which
D. though