单项选择题

Jill was not in her classroom yesterday afternoon. She ______ ill.

A) should have been
B) should be
C) must have been
D) must be
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单项选择题
I know Mrs. Casey; we ______ to each other at a party.
A) are introduced
B) are being introduced
C) were introduced
D) were being introduced
单项选择题
—He asked, What are you going to do — He asked ______ .
A) what are you going to do
B) what am I going to do
C) what I am going to do
D) what I was going to do
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