Cows must eat grain, ________ they will not grow fat.
A、or
B、but
C、when
D、though
第1题:
A.if
B.unless
C.when
D.though
第2题:
I travel to the Binhai New Area by light railway every day, _____ do many businessmen who live in downtown Tianjin.
A. as B. which C. when D. though
第3题:
第4题:
3.—__________ 1 go out for a while?
—No,you __________ You must finish your homework first.
A. Must,needn't
B. Can,may
C. May,mustn't
D. May,must
第5题: