Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
We will leave for the airport ________ he is ready.
A.as soon as
B.during
C.until
D.while

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions
_______ price is high, we cannot afford to buy a new car.
A.Now that
B.As long as
C.Whereas
D.Although

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
__________smoking is a causative factor of many diseases, there is no ban on tobacco advertising.
A.In spite of
B.Therefore
C.Although
D.However

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
Ask her to come and see me as soon as she _______ her work.
A.finish
B.has finished
C.finished
D.finishing

Choose the answer (A, B, C, D) which best fits the space
The building has a smoke detector _____ any fires can be detected immediately.
A.so that
B.if
C.as if
D.such as

Đại diện nào dưới đây ưa sống ở nước hơn trên cạn, nuốt khí vào cơ thể căng phồng như 1 chiếc phao bơi?
A.Ếch giun.
B.Cá cóc Tam Đảo.
C.Ếch cây.
D.Ễnh ương.

Lớp lưỡng cư được phân thành mấy bộ?
A.3.
B.4.
C.5.
D.2.

Cóc nhà kiếm ăn vào thời gian nào trong ngày?
A.Cả lúc trời mưa và nắng.
B.Buổi trưa.
C.Buổi chiều và ban đêm.
D.Ban ngày.

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
It was only__________ he told me his surname that I realized that we had been to the same school.
A.as soon as
B.until
C.when
D.then

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
It’s amazing how Jenny acts as though she and Darren ________ serious problems at the moment.
A.hadn’t had
B.aren’t having
C.hadn’t been having
D.weren’t having