Li Mei 　　　 her brother attended (参加) their uncle’s wedding because they were busy with the final exams.

— Look at the problem!        it’s very difficult,        I have worked it out.
— Good job.

 Mum didn’t go to bed _____ I came back home last night.

A tourist will easily lose his way in shanghai_____ he has a map or a guide.

--- I feel nervous about the coming summer.
---- Me , too. Hot weather _____ makes people feel hot, ______ causes serious health problems.

_______ it is very hot in Chongqing in summer, people still love to eat hot pot. It is the most popular food in the city.

Neither Sara nor her sisters ___________ to Beijing before, so they are planning to go there next year.

-- Be careful, _______ you will make mistakes in your exams.
--I know that, Mrs. White. One can never be too careful.

--What is our physics teacher like, do you know?
--Oh, he is very kind _________ he looks very serious.

—My dog is very gentle. He is my good friend.
—I think so. He’d never bark _______ bite.