---Look! The telephone is broken. Someone damaged it ________ purpose.

   ---That may be right. But perhaps it was broken _________ accident.

A. on; by                    B. by; by                     C. on; on                    D. by; on

The little boy fell asleep while ______TV. So his mother sent him to bed at once.

A. watched                           B. to watch                           C. was watching                   D. watching

American English has changed _______ the centuries. There are several reasons _____ this.

A. over, for               B. for, with                           C. in, of                                 D. during, about

 He looked at the envelope(信封) and _____ Jenny’s handwriting immediately.

A. realized                            B．recognized                  C．reminded                    D．remembered

What an important role the Internet _____ in our life! One can hardly imagine ____ life would be like without it.

A. plays, how          B. is, however                  C. uses, what            D. plays, what

The two boys fought and fought until one_____________.

A. gave up                           B. gave in                            C. gave away             D gave off

 The Great Wall travel _______deep valleys, ________deserts and ________mountains.

A. over, across, through                                       B. through, over, across

C. across, through, over                                       D. through, across, over

With the rapid development of recent years, the people, ____village I once worked in，live a happy life now.

A. who                                B. in whose                        C. whose                             D. in which

Hurry! The plane ______ . You know, it ______at 3:15.

A. takes off, takes off                             B. is taking off, takes off

C. takes off, is taking off                                         D. is taking off, is taking off

It is _____to see a monkey _______the bicycle.

A .fun, be riding       B. a fun, riding                    C. funny, rode           D. fun, riding