单项选择题

We warned the children time and again _________ the electric lamp.

A．not to touching
B．should not touch
C．not touch
D．not to touch
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单项选择题
Dream of the Red Chamber is said to _________ into several foreign languages in the last decade.
A．have been translated
B．have translated
C．be translated
D．translate
单项选择题
Try to imagine _________ the Pacific Ocean in a small sailing boat.
A．to be crossed
B．on crossing
C．crossing
D．to cross
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