PollutionWater pollution happens __________ toxic substances enter water bodies such as lakes, rivers, oceans and so on, getting dissolved in them, lying suspended in the water or depositing on the bed.

Choose A, B, C, or D to complete the sentences.

I always _________ be afraid of the dark.

Choose the best answer

Nguyen Du is a famous Vietnamese ………………. . ( poem )

_______ she changed a lot, we didn’t recognize her.

Choose the best answer to each question. 

I have to be present at eight o’clock and so ________.

Choose the best answer: 
Primary education in the United States is compulsory.

 Nga _______ Math in Qui Nhon University for 4 years but now she teaches in her home village

Choose the correct answer from the four options marked A, B, C, or D to complete sentence: " You had a very good time at the party last night, _______?"

 If there __________, the rice fields could have been more productive.

Choose the best answer: 
Quit beating around the ________ and say what’s on your mind.

Choose A, B, C, or D to complete the sentences.

He suffers ____ asthma.

________the weather was bad, they delayed their trip.

We've recently studied the....................of stones in the kidneys

Choose the correct answer to complete the sentence. " Banh chung____Tranh Khuc village is famous for its distinctive flavour."

If I __________the same problem you had as a child, I might not have succeeded in life as well as you have

The patient will not recover unless he __________ an operation.

Complete the following sentences: He ______ with his family in an apartment in Ha Noi since last week.

Circle the best answer A, B, C, or D.

I couldn’t sleep last night________ the bar nearby played music so loudly.

Choose the best answer to each question. 

Various societies define _______ in many rather complex ways.

Indirect sources __________ water pollution include contaminants that enter the water supply from soils or groundwater systems and from the atmosphere via rain.

 If she __________ him, she would be very happy.