bài 1 điền thì đúng
1 there (to be) big problems in many parts of the world
2 A lot of people (go) ................to work by car
3 Davis never (take) the bus to school
4 he plays volleyball but he (not enjoy ) it
5 most shops usually (open ) at 8.00 a.m and (close ) at 6.00p.m
6. school children (wear) unifrom on monday
7 i want (buy ) some stamps
8 Ruth (live) with his parents in aparment
9 he is writing a poscard and (watch ) TV at the same time