He went abroad at the age of 18, never __B_ back.
(解释一下为什么不选A,选B)
A. coming B. to come C. came D. comes
She pretended __B__ to the manager ,but actually she was thinking about something else.
(解释一下为什么不选A,选B)
A. to listening B. to be listening
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你能帮帮他们吗