Water ____ be changed into vapour but it ____ be heated to its boiling point . 
#89755
A
may ; can
B
can ; must
C
may ; needn''t
D
must ; may
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We __________ so tired. We've only been to a party.
#90010
A
mustn't have felt
B
wouldn't have felt
C
shouldn't have felt
D
couldn't have felt
(原创题)The patient insisted that he _____ ill, and _____back home at once.
#87612
A
wasn’t , was sent
B
isn’t , be sent
C
wasn’t , be sent
D
should be , send