Some friends tried to settle the quarrel between Mr. and Mrs. Smith without hurting the feeling of _____, but failed.
| A.none | B.either | C.all | D.neither | 
Rather than ______ on a crowded bus, he always prefers _______a bicycle.
| A.ride; ride | B.riding; ride | C.ride; to ride | D.to ride; riding | 
_____ of the students who took part in the military training is 450.
| A.A number | B.A lot | C.Lots | D.The number | 
The roads are crowded______ walking to work is even quicker than driving.
| A.in order that | B.so that | C.so as to | D.in order to | 
Rather than ______ at home, he prefers ______ out to play football even on a cold day.
| A.to stay; to go | B.staying; to go | C.stay; to go | D.staying; going | 
______ you call me to say you’re not coming, I’ll keep waiting for you at the theatre.
| A.Unless | B.When | C.If | D.As |