Heneversmokesdropslitterinpubl-优题课

He never smokes _______ drops litter in public.（　　）

A．

and

B．

C．

but

D．

科目英语题型选择题难度较易

知识点：连词辨析

She often practices _____ on weekends．（　　）

sing

sings

singing

to sing

Although they feel tired，_____ they still go on working．（　　）

and

but

It isn't easy for us ______ English well．（　　）

learn

learns

learning

to learn

Who cleaned the room？

Li Lei _________．（　　）

was

dose

did

The man is feeling much better now，so you ______ call a doctor．（　　）

needn't

can't

mustn't

shouldn't