The stones are so heavy. How _____ they _____ to the top of the building without modern machines?
| A．do; lift | B．did; lift |
| C．were; lifted | D．were; lift |
The boy is sleeping. Please ______ the radio.
A．turn up B．turn off C．turn on
The woman ______ be our English teacher. She has gone to Canada.
A．can’t B．needn’t C．mustn’t
—______can you finish your homework?
—In about one and a half hours.
A．How fast B．How soon C．How often
—How many women doctors are there in your hospital?
—______ them ______ over twenty.
A．A number of; are
B．The number of; are
C．The number of; is
—It’s Father’s Day today, ______?
—Yes, let’s buy a gift for Dad.
A．isn’t he B．doesn’t it C．isn’t it