The secretary worked late into the night, ______ a long speech for the president.
A．to prepare B．preparing C．prepared D．was preparing
—Tom graduated from college at a very young age.
—Oh,he__________have been a very smart boy then.
A．could B．should C．might D．must
Michael ______ be a policeman, for he is much too short.
A. needn’t B. can’t C should D. may
Why!I have nothing to confess(坦白) . ______ you want me to say?
A．What is it that B．What it is that
C．How is it that D．How it is that
The road is covered with snow.I can’t understand ______ they insist on going by motorbike.
A．why B．whether C．when D．how
He lifted the receiver as soon as the telephone rang but ____ it on the table at once.
A．lay B．lied C．laid D．lain
