单项选择题

The question （） he should accept the offer or not troubled him greatly.

A．which
B．whether
C．that
D．why

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单项选择题

I'd never have guessed he was a Wilson--he doesn't look （） like his brothers.

A．one
B．that
C．anybody
D．anything

单项选择题

Hello! I （） you were in London. How long have you been here.

A．don't know
B．hadn't known
C．didn't know
D．haven't known

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