Câu hỏi: He has been very interested in doing research on _______ since he was at high school.

A. biology

B. biological

C. biologist

D. biologically

Câu 1: Strong family ties provide us the love and _________ we need for a happy life.

A. secure

B. securing

C. security

D. securely

Câu 2: With greatly increased workloads, everyone is _______ pressure now.

A. under

B. above

C. upon

D. out of

Câu 3: It is parents' duty and responsibility to _______ hands to take care of their children and give them a happy home.

A. shake

B. hold

C. join

D. take

Câu 4: My husband and I both go out to work so we share the _______.

A. happiness

B. household chores

C. responsibility

D. employment

Câu 5: This tape stry has a very complicated pattern. (Mark the letter A, B, C, or D to indicate the word or phrase that is CLOSEST in meaning to the underlined part in each of the following questions.)

A. obsolete

B. intricate

C. ultimate

D. appropriate

Câu 6: Can you tell me who is responsible ______ checking passports?

A. to

B. in

C. about

D. for