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_____ I admit that all these problems are difficult, I don’t agree that they cannot be solved.

A．Unless            B．While            C．Until             D．Since

-----Would you please repeat it?

-----Obviously, you _____me.

A．hadn’t listened to                      B．were not listening to

C．haven’t listened to                     D．don’t listen to

The computer system suddenly_____ while he was searching for information on the Internet.

A．broke out                             B．broke up

C．broke in                              D．broke down

______I open my mouth, I put my food in it.

A．At times                              B．Some time

C．Every time                             D．By the time

 The teacher _____ the students how to improve their writing skill since last term.

A．has told                               B．is telling

C．has been telling                         D．will have told

 When someone talks, everyone is expected to listen, no matter how ______.

A．the person’s speaking may be dull

B．dull the person’s speaking may be

C．may the person’s speaking be dull

D．dull may the person’s speaking be

Will knew there was no doubt ______ that patch of grass on the other side was in a different world.

A．which            B．what             C．that              D．whether

 How I wish every family ______ a large house with a beautiful garden!

A．has              B．will have          C．had              D．have

 Our monitor, ______ it clear to us that he didn’t want to waste time playing computer games, left the Internet bar quickly.

A．made            B．having made       C．make             D．Had made