--- What is the _____ for your being late?

   --- I am sorry I missed the first bus.

 A.reason              B. excuse                    C. cause                      D. explanation

It used to be thought _____ the Earth was flat.

A. as                                                        B. when

C. since                                                    D. that

1. Tim is in good shape physically 　　　　 he doesn't get much exercise.

A. if　　　　　　 　 B. even though　　 C. unless　　　　　 D. as long as

—What made you so delighted at Christmas?

—______.

A．I received much more presents than others

B．Because my parents promised me a new car

C．My uncle's coming back from abroad

D．As there was an unusual celebration

I wonder how much ________.

A. does the watch cost　 B. did the watch cost C. the watch costed　 D. the watch costs

Neither her father nor her mother would give_____permission to buy that CD player.

　 A．his B．their　 C．her D．one’s

The plan looks good on paper, but will it _____?

A. work　　　　　　　　　　 B. pass

C. agree　　　　　　　　　　 D. does

The children talked so loudly at dinner table that I had to struggle ______.

A. to be heard B. to have been heard　 C. hearing D. being heard

A satellite is _______object traveling in orbit round another object in space.

A.the;/；the B.an;an;a C.the;an;a D.an;an;/?

Jack packed all the things into a case, ____________.

A. being anxiously to leave　　 B. to be anxious to leave

C. anxious to leave　　　　　 D. be anxious to leave