very difficult, teacher:(

1. E-mail, as well as cellphones, __________ an important role in our daily communication.
is playing
>>Correct

2.Books of this kind _________ well.
sells
>> sell
3. One of the new books ________ several pages __________.
has, missed
>> has missing
4. Writing stories and essays _________ what I enjoy most.
is
>> correct

5. The police __________ every reason to arrest him.
has
>> have
6. Every girl in the club __________ invited to attend the party.
has
>> has been

7. Professor Smith, together with his wife and two daughters, __________ to Shanghai today.
are flying
>> is flying
8. The number of tickets sold yesterday __________ much bigger than we had expected.
were
>> was
9. Reading books __________ the only habit that he developed when he was in the university.
were
>>was
10.The first five questions were quite easy, but the rest __________ hard.
were

>> Correct