Chuyên anh giúp em với Câu 1 Choose the correct answer A, B, C or D Many people donate to the Red Cross, a ________ organization that aids people free of charge. A profitable B non-profit C for-profit D profit-making Câu 2 Choose the correct answer A, B, C or D We can help to reduce ________ by using public transportation, biking and walking. A water pollution B social problems C community service D air pollution Câu 3 Choose the word which has different sound in the underlined part A. cough B. laugh C. enough D. high A cough B enough C laugh D high Câu 4 Choose the correct answer A, B, C or D Most people volunteer ________ they want to make a difference in their community. A so B because C in order to D so that Câu 5 Complete the sentences with the verb given in the correct form I ________ hundreds of e-mail in my life. I __________ ten last night. (write) A have write/ wrote B wrote/ have written. C have written/ wrote D has written/ wrote.