Tìm và sửa lỗi sai: London is a Britain's biggest city.

You must work harder or you won't pass the exam.

Don't buy ________ bread at the shop. There's a lot of in the kitchen.

Tìm và sửa lỗi sai:

His English friend told him that he would help him to learn English if he has time.

Tìm và sửa lỗi sai: The thief would steal money if he were rich.

The most excellent student ___ the scholarship would have a 5-day holiday in Ha Long Bay.

The room was ________ of strangers.

“Where does your father work?” The teacher asked me

=> The teacher asked me ______________________________.

Write about causes and effects of water pollution as well as solutions to this problem in 100-150 words.