单项选择题

We are having our dinner ______ suddenly someone knocked the door.

A．when
B．before
C．while
D．as
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单项选择题
A．Thanks.B．Yes, it is wonderful time.C．Fine. And youD．I’m glad to see you too.
A．Thanks.
B．Yes, it is wonderful time.
C．Fine. And you
D．I’m glad to see you too.
单项选择题
Helen was much kinder to her youngest child than she was to the others, ______ of course, made the others jealous.
A．who
B．what
C．that
D．which
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