单项选择题

He ______ into the office, building when the fire bell rang.

A． goes
B． has gone
C． was going
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单项选择题
Lily went to see her grandpa yesterday ______ he was ill.
A． if
B． though
C． because
单项选择题
--Hello, Alice. You ______ very happy.--Yes. I am happy. My parents are coming to see me tomorrow.
A． get
B． look
C． turn
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