____ were all very tired, but none of ____ would stop to take a rest.
A. We, us
B. Us, we
C. We, our
D. We, ours
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I will never forget the day ______ I joined the army.
A. that
B. when
C. in which
D. where
____sometimes keeps her awake at night ____ Tom is getting more and more quiet at home.
A. That; which
B. It; that
C. Whether; what
D. What; that
Tom's mother kept telling him that he should work harder, but ____didn't help.
A. he
B. which
C. she
D. it
The machine is easy to ______. All you need to do is just push this button.
A. operate
B. be operated
C. being operated
D. operating