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

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

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

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

 Look! That fellow is too sleepy to work. He ______ up reading until midnight.

________ the help from the doctor, the little boy _________ his life.

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My tutor explained that I ________read lots of different texts that contain different opinions.

He _______ speak to his mother like that.
A ought not to    B. doesn’t ought to    C not ought to      D ought to not

--- Isn’t that Jessica’s brother over there?
--- No, it _______ be him. I’m sure he doesn’t wear glasses.
A. can’t             B. must not          C won’t           D may not

. ----You just think of yourself! You kept me waiting for at least three hours．
----I am sorry that you _____ think so.