Doctors recommend that all children ________ vaccinated against measles(麻疹).A．s

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Doctors recommend that all children ________ vaccinated against measles(麻疹).

A．should

B．could be

C．are

D．be

答案

解析

略

举一反三

.
.--- Must I go there right now?
--- No, you_________.

A．don’t need

B．mustn’t

C．don’t have to

D．hadn’t better

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. -- Jack _______ for work in the downtown. What was the matter?
-- _______, but he had no luck.

A．ought to have hunted; So he was	B．ought to have hunted; So he did
C．ought to hunt; So he has	D．ought to hunt; So he did

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.
They ___ out because the light’s on. Let’s go upstairs and have a look.

A．mustn’t go

B．can’t have gone

C．couldn’t go

D．might have gone

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.
She ______have stopped her work halfway.

A．ought to not

B．ought not to

C．not ought to

D．does not ought to

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.
. ----She looks so unhappy. Did you tell her the truth yesterday?
----Yes, but I ____ her later.

A．must have told	B．should have told
C．shouldn’t have told	D．mustn’t have told

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