20. Henry………….into the restaurant when the writer was having dinner. giải thích giúp mình nhé A. had gone B. went C. will go D. goes 21. ……………he worked hard, he could not finish the job. A. although B. because C. despite D. because of 22. ...............................I was really tired, I couldn’t sleep. A. Eventhough B. So C. Therefore D. Because of 23. Does she suggest..................................some more butter? A. to buy B. buying C. buys D. bought 24. The new appliance does not only work ...............................but also saves energy. A. effective B. effect C. effectively D. effectiveness 25. You should travel by bike..........................by motorbike to save energy. A. instead of B. therefore C. however D. beacause 26. You should wear ..................to keep your hands warm. It’s very cold outside. A. hats B. shoes C. boots D. gloves 27. This shirt is ..................big that I can’t wear . A. so B. too C. such D. to 28. The students ....................happily when the bell rang. A. played B. are playing C. were playing D. have played