—You look so tired. You________ late last night.
—Yes. I had to to do an important report and stayed up till I completed it.
A.should sleep B.must sleep
C.should have slept D.must have slept
Last week, we visited the Three Gorges Dam,________is the greatest key water control project in the world at present.
A.that B.which
C.what D.where
Our country has become the first country in the world________ a spaceship on the far side of the moon successfully.
A.to land B.landed
C.landing D.having landed
—Mom, I’m tired of doing the homework. Can I watch TV now?
—You________ after finishing you work.
A.need B.must
C.should D.shall
Susan took a taxi and hurried to arrive at the company, only________ that the meeting had been put off.
A.to tell B.to be told
C.telling D.being told
Our English teacher creates a friendly and relaxing atmosphere in the class________ we are free to express ourselves.
A.that B.which
C.where D.when
