You may have ______ an apple ______an orange, not both.

           A. neither; nor    B. either; or       C. as; as       D. not only;but also

 More and more trees were cut down. _____, many animals are dying out.

       A.In the end       B.So that          C.As a result     D.At last

 —David has made great progress recently.

—_____, and _____.

A.So he has; so have  you                    B.So he has; so you have

C.So has he; so have you                        D.So has he; so you have

 Our teacher told us that light _____ much faster than sound.

A.traveled               B.travels                C.is traveling          D.was traveling

In our class, _____ of the students _____ girls.

A. third fifths; is      B. third fifth; are    C. three fifth; is      D. three fifths; are

The apples are divided _____ two _____. One is for my sister, the other is for me.

              A. in; half               B. in; halves         C. into; halves      D. into; halfs

—Have you finished your homework?

—Not _____. There are still some exercises to be done.

A. yet　　 　　　 B. already　　　 C. just　　　　　　　 　 D. ever

 —Would you like to have _____?

—No, thank you. I’ve had enough.

A. anything more                            B. something more

C. more anything                             D. more something

 Trees can stop the sand _____ towards the rich farmland in the south.

A. moved           B.to move       C. from moving      D. moves

We should often keep _____ touch with each other, because we are good friends.

　　　　　　 A. on　　　　　　　　　　　 B.to　　　　　　　　 C.in　　　　　　　　　　　　 D.up.