A computer is so useful a machine ________ we can use everywhere.

 A. that   B. which  C. as  D. what

—He must be busy doing his homework right now.

   —I imagine____.

  A. that     B. to     C. so     D. it

Listen to the two girls by the window. What language ___________?

                  A．did they speak             B．were they speaking 

             C．a(chǎn)re they speaking           D．have they been speaking

----Wake up, Tom. Time to rise.

-----I_____ asleep while I was reading.

A. should have fallen   B. must have fallen   C. could fall   D. must fall

Mr. Lin’s comments were very difficult to follow because they were ______related to the topic under discussion.

A.     specifically  B. precisely  C.loosely  D.typically

There has been ____rising demand for grain as ____industrial material in spite of the nation’s good harvests.

A./;an  B.a;an  C.the;an  D.a;/

---What a bright room! Is it a classroom?

----No, it  ___  the students’ reading---room.

A. refers to  B. stands for   C. is supposed to be   D. is meant for

______the photos of the coastal city, I have no desire to visit it,it’s crowded all year.

A.     To see  B. To have seen  C. Seeing  D. Having seen

To save class time, our teacher has ______students do half of the exercises in class and complete the other half for homework.

A.     us  B.we  C.our  D.ours

Thank you for giving up your coffee break to help.I know you always need_____after three classes.

A. that   B. one  C. it  D. this