A.To produce
B.Being produced
C.Produced
D.Having produced
A.to learn
B.learn
C.learned
D.learning
开始考试点击查看答案A.came
B.comes
C.come
D.coming
开始考试点击查看答案A.being moving
B.moved
C.moving
D.to be moved
开始考试点击查看答案A.to keep them for reference
B.keeping them for reference
C.if she should keep them for reference
D.to be kept for reference
开始考试点击查看答案A.Having madethe decision
B.The decision havingbeen made
C.Has the decision been made
D.The decision hasbeenmade
开始考试点击查看答案A.having added
B.to add
C.adding
D.added
开始考试点击查看答案A.caused
B.to cause
C.cause
D.causing
开始考试点击查看答案A.to visit
B.visiting
C.to have visited
D.having visited
开始考试点击查看答案A.wait
B.tobe waiting
C.to wait
D.waiting
开始考试点击查看答案A.turning
B.toturn
C.turned
D.turns
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