[ Modal Verbs ]
The government _______ improve the infrastructure of big cities to boost the economy.
A. mustn’t
B. doesn’t have to
C. should
D. didn’t have to
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Grammar Past and Future Tense › ViewDid you drink orange juice this morning?
A. No. I drink pineapple juice.
B. Yes. I drank orange juice.
C. No. I did
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Tenses and Word Formation › View
At that time, it_____, the contract satisfied all parties.
A. were signed
B. was signed
C. sign
D. signed