5* nha mng 21. The moon (go)…. round the earth in about 27 days. 22. That bag looks heavy. I (help)….. you with it? 23. It's her birthday. She (have)….. a meal with her friends 24. The letter (come)….a few days ago 25. Lan's teacher wants her(spend)…. More time on math 26. I promise I (try)…. My best next semester 27. Lính needs (improve)…. Her english writing 28. they didn’t try(learn)….all new words they(come)…acrots 29.you should( underline)….the words you want( learn)…… 30.can you help me(move)…. This table? 31. Minh always (get)…. grade A for Physics, but last semester he (get)….B.So Minh’s teacher asked him( study)….harder this semester