Một chiếc hộp đựng 10 bi đỏ, 8 bi vàng và 6 bi xanh. Lấy ngẫu nhiên ra 4 viên bi. Xác suất để các viên bi lấy ra đủ cả 3 màu:

A.  1680 10626 .

B.  5040 10626 .

C.  1200 10626 .

D.  2160 10626 .

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

For more than six million American children, coming home after school means coming back to an empty house. Some deal with the situation by watching TV. Some may hide. But all of them have something in common. They spend part of each day alone. They are called “latchkey children”. They are children who look after themselves while their parents work. And their bad condition has become a subject of concern.

Lynette Long was once the principal of an elementary school. She said, “we had a school rule against wearing jewelry. A lot of kids had chains around their necks with keys attached. I was constantly telling them to put the keys inside shirts. There were so many keys; it never came to my mind what they meant.” Slowly, she learned that they were house keys. She and her husband began talking to the children who had keys. They learned of the effect working couples and single parents were having on their children. Fear wasthe biggest problem faced by children at home alone. One in three latchkey children the Longs talked to reported being frightened. Many had nightmares and were worried about their own safety. The most common way latchkey children deal with their fears is by hiding. They may hide in a shower stall, under a bed or in a closet. The second is TV. They often turn the volume up. It’s hard to get statistics on latchkey children, the Longs have learned. Most parents are slow to admit that they leave their children alone.

Question 44. What is the most common way for latchkey children to deal with fears?

A. Talking to the Longs

B. Hiding somewhere

C. lying under a TV

D. having a shower

Mark the letter A, B, C, or D on your answer sheet to indicate the word CLOSEST in meaning to the underlined word in each of the following questions.

When being interviewed, you should concentrate on what the interviewer is saying or asking you.

A. Be related to

B. express

C. pay attention to

D. be interested in

Hiện tượng thai sinh là

A. hiện tượng đẻ con có nhau thai.

B. hiện tượng đẻ trứng có nhau thai.

C. hiện tượng đẻ trứng có dây rốn.

D. hiện tượng đẻ con có dây rốn.