The reason why he didn't come to school was () he was ill.

The reason why the mice in Ader's experiment avoided saccharin was that ________.

A．they disliked its taste

B．it affected their immune systems

C．it led to stomach pains

D．they associated it with stomach

A.why, because

B.that, because

C.why, /

D.that, that

A.why/that

B.that/that

C.…/because that

D.that/…

A.when

B. why

C. how

D. whose

A.to do

B.doing

C.doing it

D.to

I don’t know the reason he was absent.

A、why

B、because

C、which

D、as

The reason why he sends her a gift immediately is ______ if he doesn't.

A．that she will disappoint

B．because she will be disappointed

C．because she will have disappointed

D．that she will be disappointed

[A] why

[B] which

[C] that

[D] how

A、why

B、how

C、that

D、for

听力原文：W: I think Tom left his umbrella on the bus.

M: Why he's so irresponsible is beyond me.

What does the woman say about Tom？

A．He got off the bus at the wrong stop.

B．He has a good reason to be angry.

C．He isn't careful with his belongings.

D．He doesn't have an extra umbrella.