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题目
题型:不详难度:来源:
I’m sorry to have kept you ________ for a long time.
A. wait       b. to wait     c. waiting     D. to be waiting
答案
C
解析

核心考点
试题【 I’m sorry to have kept you ________ for a long time. A. wait       b. to wait  】;主要考察你对现在分词等知识点的理解。[详细]
举一反三
This book is worth _____.
A.to read itB.reading it C.readingD.to read

题型:不详难度:| 查看答案
Greatly_________ as the leading scientist,he was asked to give lectures in many countries.
A.respectingB.respects
C.respectedD.to respect

题型:不详难度:| 查看答案
The boy was seen_________ in the examination and was punished by the teacher.
A.having cheatedB.cheated
C.cheatingD.cheat

题型:不详难度:| 查看答案
A new technique_________, the yields as a whole increased by 20 percent.
A.working out
B.having worked out
C.having been worked out
D.to have been worked out

题型:不详难度:| 查看答案
When I came back,I noticed that he was still sitting in the office.He seemed_________ for someone.
A.waitedB.to have waited
C.to be waitingD.to wait

题型:不详难度:| 查看答案
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