With trees and grass_____ about 35% of the urban area,the city of Hefei has taken on a new look.
A.covered B.being covered C.to be covered D.covering
Process so far has been very good.______,we are sure that the project will be completed on time.
A.However B.Otherwise C.Therefore D.Besides
— When do we need to pay the balance?
— ____ September 30.
A.In B.By C.During D.Within
______ and out of breath, we reached the top of the mountain and stopped _____ the beautiful scenery.
A.Tiring, to admire B.Being tired, admiring
C.Tired, to admire D.Tired, admiring
I greeted the teacher with “ hello”, and the teacher gave me a sweet smile ______.
A.by turns B.in return
C.in turn D.for turn
Do you know the trouble he had _____ the work?
A.on finishing B.to finish
C.having finishing D.finishing