问题
选择题
Don't hesitate to ______ us if he doesn't ______ in time.[ ]
A. turn to; turn off
B. turn to; turn up
C. turn up; turn to
D. turn down; turn up
答案
答案：B
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Don't hesitate to ______ us if he doesn't ______ in time.[ ]
A. turn to; turn off
B. turn to; turn up
C. turn up; turn to
D. turn down; turn up
答案：B
