E1: Chuyển các động từ sau sang dạng quá khứ.
1.smile - ________ 2.fly - flew_ 3.correspond - ________ 4.enjoy - ________
5.hug - __________ 6.dance - _________ 7.drink - _______ 8.drop - _________
9.rob - __________ 10.study - _________ 11.fall - ________ 12.write - ________
13.stay - _________ 14.cry - ________ 15.separate - _______ 16.empty _________
17.annoy - _______ 18.hang - _______ 19.cost - __________ 20.choose - ________
1 smiled
3 corresponded
4 enjoyed
5 hugged
6 danced
7 drank
8 dropped
9 robbed
10 studied
11 fell
12 wrote
13 stayed
14 cried
15 seperated
16 emptied
17 annoyed
18 hung
19 cost
20 chose
1, smiled
2,flew
3,corresponded
4,enjoyed
5,hugged
6,danced
7,drank
8,dropped
9,robbed
10,studied
11,fell
12,wrote
13,stayed
14,cried
15,separated
16,emptied
17,annoyed
18,hung
19,cost
20,chose
