Until then, his mother _____ from him for two months.
A. didn’t hear
B. hasn’t been hearing
C. hasn’t heard
D. hadn’t heard
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It’s about time _____ on something.
A. I’d decide
B. I decided
C. I decide
D. I’m deciding
The dictionary I bought yesterday _____ me ten dollars.
A. is cost
B. cost
C. was cost
D. have been cost
Einstein has ever said “Politics ____ much more difficult than physics.”
A. has
B. have
C. is
D. are
It’s necessary that _____ them to give us a hand.
A. we asked
B. we ask
C. we will ask
D. we asking
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