—Mary，I don’t know ____ you can come tomorrow morning.—No problem! I’ll be here ____

—Mary，I don’t know ____ you can come tomorrow morning.—No problem! I’ll be here _____I’m free then.

#55784

if；if

if; whether

whether；till

whether；until

推荐题目

Hold on to your dreams, _________ one day they may just come true.

#55144

and

but

Most students watch TV three ____ four times a week.

#55936

and

but

However

—_____ does your brother go online?  —Let me see. Maybe two or three times a week.

#56066

What time

How long

How often

How soon

—Susan, what are the advantages of MP5 players?—Mom, they are smaller and lighter ______ they can be carried very easily.

#56356

unless

until

so that

I am sure you will make it in the end _________ you have worked so hard.

#57253

although

but

because

共1556题