Trong dạ dày

1.C

2.A

3.B

4.A

5.D

6.A

7.D

8.A

9.B

10.D

They began to learn English from a young age

C

My sister started using the dictionary in the last 10 years

My friend started working in this company within the last 6 months

D

13.A

18.C

1.has

2.is flying / is landing

3. visiting 

4.throw

5.don't go

phayed

practices