Each of the following sentences has an error. Find the errors and correct them.

Major advertising companies have traditionally volunteered its time to public service accounts.

Choose the best answer: 
My son is quite___ in biology.

Choose the best answer to each question. 

Vietnam’s rice export this year will decrease ______ about 10%, compared with that of last year.

Choose the best answer to each question. 

The ________of plastic bags gathered was nearly the same in both years.

Do you surf the internet for fun or _______________?    (educate)

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A ....................... is a bridge that carries one road over another one.

Choose the correct completion

Don't chew gum in the classroom,......?

Each of the following sentences has an error. Find the errors and correct them.

I used to sit next to a man who name is Almed.

Choose the best answer to each question. 

The house is found ________ down.

Choose the best answer to each question. 

Do you understand _________?

Choose the best answer to each question. 

You can borrow my book _________you bring it back by Monday.

Choose the correct answer to complete each of the following sentences.

Not only ………………in the project, but he also wanted to become the leader.

Choose the best answer to each question. 

After the accident, the injured cyclist was in great________.

 The “Kien Thuc Ngay Nay” is _______read by both teenagers and adults

You shouldn’t believe in things in the __________ world.

How can we remember all these vocabulary items? - Well, ...................

Choose the best answer

I wish I ________you some money for your rent, but I’m broke myself.

Identify the word or phrase that must be changed for the sentence to be correct.

Throughout the United States there is fast food restaurants where hamburgers are served. 

 Those new students hope _______in the school’s sports activities.

Do you find the internet ______, Nam?

Don’t forget (do)................................... your homework!