[ Modal Verbs ]
Which modal verb is used to express a past possibility?
A. Shall have
B. Will have
C. Can have
D. Might have

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Modals › ViewGeorge you …………… eat during the lesson.
A. have to
B. should
C. must
D. mustn’t
Grammar › View
Noah Webster an American Dictionary of the English Language in two volumes in 1828, and since then it ____ the recognised authority for usage in the United States.
A. published/became
B. has published/has become
C. published/was becoming
D. published/has become
Grammar › ViewIt will___only about 50 minutes to travel to Mount Wuyi by high-speed train.
A. take
B. make
C. spend
D. cost
Vocabulary › View
The ____ documents were authorized by the government last week.
A. skillful
B. retained
C. prime
D. official
