Nitơ có chức năng chủ yếu nào và khi thiếu nitơ cây có triệu chứng gì?
A.Thành phần của prôtêin, axit nuclêic, sinh trưởng bị còi cọc, lá có màu vàng.
B.Duy trì cân bằng ion, cây bị còi cọc.
C.Thành phần của xitôcrôm, lá có màu vàng.
D.Hình thành bản giữa vách tế bào, lá có màu vàng.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
My senior colleague suggested that Jake _______________ as soon as possible.
A.hired
B.be hired
C.hiring
D.hire

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
It is best that people ____________ to choose where to live.
A.able
B.be able
C.are able
D.being able

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
I suggest that you ________________ the house without considering the price again.
A.not renting
B.not rent
C.to not rent
D.not to rent

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
The seller suggests that Daisy ________the directions carefully before using the hair-dryer.
A.read
B.to read
C.reads
D.reading

Choose the underlined part that needs correction in the following sentence
Christine demanded that I allow to take part in the negotiations.
A.allow
B.to take
C.demanded
D.negotiations

Choose the underlined part that needs correction in the following sentence
For the future-being of the organization, it is imperative that he should be taken on the duty now.
A.be taken
B.future-being
C.imperative
D.should

Choose the underlined part that needs correction in the following sentence
It is significantly that Tom come back home before 10 p.m.
A.before
B.significantly
C.that
D.come

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
The teacher insists that she ___________ the classroom until she finishes her breakfast.
A.not to enter
B.not enter
C.to not enter
D.not entering

Choose the underlined part that needs correction in the following sentence
The school principal insist that she resign from her post as deputy head immediately.
A.post
B.resign
C.as
D.insist