—So many problems! I’m tired. —You should try to them by yourself. You are not a child any longer.
At least 300 million people are using QQ_____ by Ma Huateng to chat online.
---- I’m very tired these days because of studying for exams. -----Why not _____ music. It can make you _____.
It’s kind ___________Simon to give us ________advice.
—Could you tell me ____? —It’s twenty minutes by underground.
—Remember to turn off the lights before leaving the classroom, children. —______.