单项选择题

When we got there, what were left behind ______ empty bottles.

A. had been
B. are
C. were
D. was
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单项选择题
Iceland lies far north in the Atlantic, with its northernmost tip actually ______ the Arctic Circle.
A. touched
B. touches
C. touching
D. being touched
单项选择题
With his poor English, he even cannot get his ideas across, ______ exert any essential effect on others.
A. let alone B. that's to say C. not to speak D. not to say
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