单项选择题

I was halfway back to the factory where I worked（）Tom caught up with me.

A. when
B. while
C. until
D. though

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单项选择题
（31）（）

A. to entertain
B. entertainment
C. entertaining
D. entertained
单项选择题
Whom does the new move in Cuba apply to（）

A. Cuban citizens only.
B. Permanent residents only.
C. Temporary residents.
D. Cuban citizens and permanent residents.
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