Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Didn’t the professor command that Mark ___________ his paper before the end of the week?
A.submitted
B.to submit
C.submitting
D.submit

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
The sign at the street recommends that you ___________ the road when the light is red.
A.not to cross
B.cross
C.crossing
D.not cross

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
 
It is essential that you _____________ the truth to your wife.
A.are telling
B.telling
C.told
D.tell

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
 
Tom’s parents insist that he _____________ to work in his hometown after graduation.
A.returning
B.return
C.returns
D.returned

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
It is urgent the patient ______________ some special treatment soon.
A.receive
B.be received
C.receiving
D.to receive

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
The teacher demanded that Tom ___________ to his classmate immediately for his mistake.
A.apologize
B.apologizing
C.apologized
D.apologizes

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Professor Burns suggested that Andy ___________ his Master degree in the UK.
A.takes
B.took
C.take
D.taking

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
It is necessary that she ______able to come with him.
A.being
B.to be
C.be
D.is

Nguyên nhân của bệnh viêm da mụn trứng cá là?
A.Do vi khuẩn.
B.Do nấm.
C.Do nhiệt.
D.Do hóa chất.

Hiện tượng mụn trứng cá ở tuổi dậy thì chủ yếu là do sự tăng cường hoạt động của bộ phận nào?
A.Tuyến nhờn.
B.Tầng sừng.
C.Lông và bao lông.
D.Tuyến mồ hôi.