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A.set aside B．set about

C．set down D．set up

A．won'tB．haven't

C．didn'tD．can't

A.in addition to B．in favor of

C．in reply to D．in search of

【題目】-- Why are you so late?
-- I was on half the way when it ____ to me that I had left my notebook home, so I had to fetch it.
A.hit
B.occurred
C.happened
D.reminded

A．will sitB．will be sitting

C．a(chǎn)re sittingD．a(chǎn)re to sit

【題目】Exactly ______ the potato was introduced into Europe is uncertain, but it was probably around 1565.
A.whether
B.why
C.how
D.when

A．when B．before C．a(chǎn)fter D．Since

一Oh，sorry．I____ know that．

A．haven’t known B．hadn’t know

C．didn’t know D．don’t know

A．seriously B．fluently

C．frequently D．Plainly

A. when B. which C. who D. where