单项选择题

You ______yesterday if you were really serious about the job.

A．ought to come
B．ought have come
C．ought come
D．ought to have come
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单项选择题
______the temperature, ______water turns into steam.
A．The high; the fast
B．Higher; faster
C．The more higher; the faster
D．The higher; the faster
单项选择题
It is requested that all the students ______present at the meeting tomorrow.
A．were
B．are
C．will be
D．be
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