填上适当的词,完成句子

填上适当的词,完成句子
1.He left the classroom ( ).I didn't even know when he left.
选择
1.This box is much ( ).I can't carry it.
A.heavy B.heavier C.more heavy
2.Taking buses in Beijing is ( ) than taking a taxi.
A.more cheap.B.much cheaper C.a little cheap
3.We can do it better with （ ） and（ ）twin sister
A.less fewer B.fewer less C.fewer fewer
.