3,didn't write / phoned
4,goes / didn't go / went
5,is reading
6,taught
7,watched
8,Does he brush
9 và 10 giống câu 4
11,will have
12,will help / finishes
13,will send
14,sent
15,taught
16,will travel
17,wrote
18,is writing
19,taught
20,talks / is
21,to buy
22,plays
23,watches / reads
#good_luck