______ this is your first visit to Shanghai, let me show you around the city.

The two brothers _____ every day and there was no love left between them

The problem was raised ________ we shouldget all the machines________.

The authors of computer viruses are geniuses.—— I agree. They can apply their wisdom to other net technology ________ human beings can benefit.

In some ways ,Lily and Lucy look , but the twins are a little different each other.