Trong các chất sau: (1) H2NCH2COOH; (2) ClH3NCH2COOH; (3) H2NCH2COONa; (4) H2N(CH2)2CH(NH2)COOH; (5) HOOC(CH2)2CH(NH2)COOH. Chất làm quỳ tím ẩm hoá đỏ là
A.(3), (4).
B.(2), (3).
C.(2), (5).
D.(3), (5).

They have robbed the bank near my house.
A.The bank near my house has been robbed.
B.The bank near my house have been robbed.
C.The bank near my house has not been robbed.
D.Near my house has been robbed the bank.

We'd better speed up if we want to get to the concert in time.
A.put down
B.lie down
C.slow down
D.turn down

Thủy phân tripanmitin trong môi trường axit thu được
A.C15H31COOH và glixerol.
B.C15H31COONa và glixerol.
C.C15H29COOH và glixerol.
D.C15H29COONa và glixerol.

Mark the letter A, B, C or D to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions.
There are many hurdles still to get over before the new restaurant can open.
A.learn
B.overcome
C.overwhelm
D.overload

Which of the following statements is NOT correct?
A.The Egyptians used makeup to help their skin.
B.The Romans used chalk to make their faces white.
C.Queen Elizabeth I had blond hair.
D.All of the above.

In the last paragraph, what does the author imply a major function of hypotheses?
A.Communicating a scientist's thoughts to others.
B.Sifting through known facts.
C.Linking together different theories.
D.Providing direction for scientific research.

Bảng biến thiên bên dưới là của hàm số nào sau đây?
A.\(y = \dfrac{{x - 1}}{{x - 2}}\)
B.\(y = \dfrac{{2x - 1}}{{x - 2}}\)
C.\(y = \dfrac{{x + 1}}{{x + 2}}\)
D.\(y = \dfrac{{x - 5}}{{x - 2}}\)

A.jumps
B.arrives
C.follows
D.rains

Carefully though ________, he could not manage to escape the accident.
A.he drove
B.did he drive
C.does he drive
D.he is driving