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- 21To everyone's amazement now, technology ________ faster than most people can keep pace with.
A.is changing
B.will change
C.changes
D.has changed
开始考试练习点击查看答案 - 22The manager is said to have arrived back from Paris where he _______ some European business partners.
A.would meet
B.is meeting
C.meets
D.had met
开始考试练习点击查看答案 - 23Nearly half a million immigrants,many of them English—speaking, ______ in the country during the last quarter of the nineteenth century.
A.have arrived
B.had arrived
C.arrived
D.have been arriving
开始考试练习点击查看答案 - 24Sorry, I am too busy now. If I _____ time, I would certainly go for an outing with you.
A.have had
B.had had
C.have
D.had
开始考试练习点击查看答案 - 25There are lots of problems in your hometown, but we're happy to see many of them__________.
A.are solving
B.are solved
C.have solved
D.are being solved
开始考试练习点击查看答案 - 26Using a telescope we could see that something ______ .
A.is happening
B.happened
C.would happen
D.was happening
开始考试练习点击查看答案 - 27—You may find the key to the math problem on page 107. —Ah, it's so simple. I wonder why I _____ of that.
A.hadn't thought
B.haven't thought
C.didn't think
D.wasn't thinking
开始考试练习点击查看答案 - 28Jack could have avoided that terrible car accident, but he ________ careful enough.
A.is not
B.hasn't been
C.was not
D.hadn't been
开始考试练习点击查看答案 - 29Mr. Lee, who _______ as a carpenter for over 10 years, is now a very famous statesman in this country.
A.has worked
B.had worked
C.worked
D.works
开始考试练习点击查看答案 - 30When Nancy was at college, she ____ three foreign languages, but I am surprised to find that she ____ all except a few words of each.
A.spoke; had forgotten
B.had spoken; had forgotten
C.spoke; has forgotten
D.had spoken; has forgotten
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