Giun đốt đa dạng về:
A.Loài, lối sống và môi trường sống.
B.Môi trường sống.
C.Loài.
D.Lối sống.

Giun đốt có bao nhiêu tác hại dưới đây?
a. Đỉa kí sinh gây hại cá, vắt hút máu thú rừng và người.
b. Một số loài vật trung gian truyền các bệnh kí sinh (đỉa trâu truyền bệnh kí sinh đường máu cho trâu, bò ...)
c. Làm bẩn hệ sinh thái.
d. Phá hại mùa màng.
A.4.
B.2.
C.3.
D.1.

Rươi sống ở môi trường:
A.Nước lợ.
B.Nước ngọt.
C.Trong đất.
D.Trên cạn.

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in the following question.
Chemical engineering is based in the principles of physics, chemistry, and mathematics.
A.principles
B.in
C.mathematics
D.chemistry

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
We would save thousands of lives if we ______out the remedy for the flu.
 
A.had not found
B.will find
C.find
D.found

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
If it _______ convenient, let’s meet at the park.
A.will be
B.was
C.is
D.would be

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
You______ if you take a map.
A.would get lost
B.won't get lost
C.would have got lost
D.will get lost

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
I'll pay you double _______ you get the work finished by Friday.
A.if
B.unless
C.provided
D.supposing

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
I know I'll feel better if I_____ smoking.
 
A.had stopped
B.stopped
C.stop
D.will stop

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in the following question.
Building thousands of years ago, the ancient palace is popular with modern tourists.
A.ago
B.Building
C.popular with
D.the ancient