1 . According to the agreement in the World Meteorological Congress, the resolution come into effect upon signature.
A.should | B.shall | C.would | D.must |
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2 . I ______ pay Tracy a visit, but I am not sure whether I will have time this Sunday.
A.should | B.might | C.would | D.could |
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3 . There were no signs that the fire had been set deliberately. It ________ by a cigarette end, I guess.
A.would have been caused | B.should have been caused |
C.might have been caused | D.must have been caused |
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