Cho tam giác ABC có a = 9, b = 10, c = 11. Diện tích của tam giác ABC bằng

A. 60 2

B. 15 2

C. 20 2

D. 30 2

We/ ought/ study/ hard/ please/ our parents.

A. We ought to study hard to please our parents.

B. We ought studying hard to please our parents.

C. We ought to study hard to pleasing our parents.

D. We ought to studying hard to please our parents.

Choose the best answer. The proposed change in the law would make abortion_______except for strictly defined medical reasons

A. Legal

B. Legally

C. Illegal

D. illegally

Điền số thích hợp vào chỗ trống: