ĐÁP ÁN+GIẢI THÍCH:
11/ as
so sánh bằng
12/ the most hard-working
so sánh nhất
13/ more carefully than
so sánh hơn
14/ carefully
15/ well
16/ harder
17/ quickly
18/ intelligent as
19/ hard-working
chăm chỉ
20/ better
so sánh hơn good→better
21/ the harder/the better
22/ the later/the louder
23/ better and better
ngày càng tốt hơn