1.Marconi (inventer)..................the radio 2.The students must (be)........................back by 5.30 p.m 3.Nam (like)...........basketball 4.I hope (visit)..........................you in Hanoi soon 5.Why (be).............................Lan absent from school yesterday 6.I'd like(buy) ..................................a new dictionary 7.Nga (receive)............................a letter two days ago 8. Yesterday, Mai (go)..............................to the supermarket 9. Nam would like (tell).............................you about his family 10.Vegetables often (have)..................................dirt from the farm on them 11.Be careful, the children (cross).........................the street 12.Mai (be)............................15 years old next year 13.I (not watch)....................................TV last night, I (read)......................a newspaper