单项选择题

I'm ____________.

A. in Row 1
B. on Row 1
C. in 1 Row
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单项选择题
I am afraid that I am not able to finish the task in ______ a short time. Could you help me, please
A. so
B. such
C. this
单项选择题
He doesn't come today. He ______ be ill.
A. must
B. can
C. should
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