He is the only one of the students __________ want to accept the teacher's advice.
A. that don't B. who don't
C who doesn't D. that do
—Who______ it be that is knocking at the door?
—It ______ be Father, but I’m not sure.
A.can; must | B.can; may | C.must; can | D.may; must |
Once harm is _______ to the eco-system, all species will ________, including man himself.
A.made; be in danger | B.done; be dangerous |
C.caused; be endangered | D.done; be in danger |
The stamp on the letter is an art, from _______ we can get a lot of cultural knowledge.
A.whom | B.which | C.them | D.those |
It is believed that a new kind of drug ______ by the scientists and they are hopeful that they will succeed in a few months.
A.has been developed | B.is being developed |
C.is developing | D.has developed |
Jenny nearly missed the flight ________ doing too much shopping.
A.as a result of | B.on top of | C.in need of | D.in front |