Who can I ask ________ help if I don’t know ________to deal with the problem– Your parents， I think.

could hardly see the words onthe blackboard, ________

More and more fast-food restaurants have _____ all over the town in the last few years.[ ]

I don’t think home shopping will take the place of in-store shopping completely, _____ shopping online is very popular among customers.

____ the chat room ten minutes ago, you would have known what we were talking about! [ ]