单项选择题

My brother and I really have no idea as to () about this sudden change of the situation.

A.what to do
B.to do what
C.how to do
D.how can I do

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She took off her boots and () on the floor near the door.

A.dropped
B.fen
C.pushed
D.threw
单项选择题
Jane knew he was the very man she wanted to marry () she saw him.

A.the moment when
B.the moment as
C.the moment
D.the moment which
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