Experiments _________ represent a giant step into the medicine of the future.
A.using gene therapy
B.they use
C.use gene therapy
D.gene therapy uses

This one is prettier, but it costs ____ as the other one.
A.twice as many
B.as many as
C.twice as much
D.as much as

Could we picnic here?" "______"
A.No, you may not.
B.I'm afraid so.
C.Not, I think.
D.I'm sorry. I'm afraid you can't.

She asked Janet to repeat what she had said.
A."Will you please repeat what Janet said?", she asked.
B."Please repeat what Janet had said.", she asked.
C."Please repeat what you say, Janet.", she said.
D."Please repeat what you said, Janet." , she said

We can't sign this contract because we have got _________ information about the partner to base on.
A.too few
B.so many
C.so little
D.too little

America, as well as Japan, England, and Germany_______.
A.are developed countries
B.are developing countries
C.is a developed country
D.is developing countries

Since they aren't answering the phone, they _______ their house.
A.need have left
B.can't have left
C.must have left
D.should have left

Not everybody thinks the building is ugly. _________ some people say it looks marvelous.
A.On the contrary
B.Because
C.Although
D.Since

Jim: "What about going out for some drinks?" Linda: "_________ Let's do that."
A.I can't agree with you more.
B.I'm afraid I can't do.
C.Sorry, I don't like
D.No, it's interesting, isn't it?

_______ to his brother's graduation ceremony, George wouldn't have met Mary.
A.Had he not gone
B.Hadn't he gone
C.If he has not gone
D.If he shouldn't have gone