题目内容
I had some difficulty in carrying out the plan.
A making
B keeping
C implementing
D changing
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更多问题
Questions 29 to 31 are based on the passage you have just heard.
第29题：
Filters and low tar tobacco make smoking safer.
A) distinguished B) different C) protected D) isolated
“some” in the last sentence of the first paragragh refers to
A some cocoa trees
B some chocolate drinks
C some South American Indians
D some shops
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