Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

John forgot ______ his ticket so he was not allowed ______ the club.

A. brought/enter

B. bring/entering

C. bringing/to enter

D. to bring/to enter

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrases that best fits each of the numbered blanks. Fill in the appropriate word in question 35

Nowadays people are more aware that wildlife all over the world is in danger. Many species of animals will become (33)___ if we do not make an effort to protect them. There are many reasons for this. In some cases, animals are (34) __for their fur or for other valuable parts of their bodies. Some birds, such as parrots, are caught alive and sold as pets. For many animals and birds the problem is that their habitat - the place where they live - is (35) __ . More land is used for farms, for houses or industry, and there are fewer open spaces than there once were. Farmers use powerful chemicals to help them grow better crops, but these chemicals pollute the environment and (36) _____ wildlife. The most successful animals on earth- human beings - will soon be the only ones (37) _____ , unless we can solve this problem.

A. exhausting

B. departing

C. escaping

D. disappearing

Gen có 90 chu kì xoắn và tỉ lệ X + G A + T = 1 , 5  .Mạch thứ I (mạch bổ sung) của gen có 90 N loại T và × =40% số Nucleotit mỗi mạch .Gen phiên mã cần được cung cấp 450 rNucleotit loại U . Số rNucleotit mỗi loại A,U,G,X môi trường cần cung cấp cho quá trình phiên mã lần lượt là.

A. 1350,450 ,900,1800                           

B. 90 ,270 ,360 ,180

C. 450,1350 ,1800 ,900 

D. 270 ,90,180 , 360