C. have taken place D. are taking place

13. I must __________immediately because I have got a high fever

and I am afraid I can't finish the work on time.

A. replace B. be replacing

C. be replaced D. have replaced

14. Although all of the apples __________,none of them

__________ good.

A. have been tasted; taste B. have been tasted; are tasted

C. have tasted; taste D. have tasted; are tasted

15. These kinds of flowers __________well if they are planted in

the place.

A. have grow B. will be grown

C. are grown D. will grow

C

C