According to the passage, the invention of the visible-light microscope allowed scientists to




A.understand more about the distribution of the chemical elements
B.develop the electron microscope later on
C.discover single celled plants and animals they had never seen before.
D.see viruses directly

_______ in the atmosphere is the temperature falling below freezing.




A.What is frost produced
B.What produces frost
C.Frost is produced
D.Frost produces

Mark the letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions

If it hadn’t been for his carelessness, we would have finished the work




A.He was careless because he hadn’t finished the work
B.If her were careful, we would finish the work
C.If he had been more careful, we would have completed the work
D.Because he wasn’t careless, we didn’t finish the work

The word "evidenced" in line 22 is closest in meaning to……………




A.questioned
B.repeated
C.indicated
D.exaggerated

I ( not meet) ___________ Lan since we left school.




A.
B.
C.
D.

Identify the error in each of the following sentences.
In 1964, a farmer claimed he saw an egg-shape object in one of his fields.




A.claimed
B.saw
C.egg-shape object
D.his fields

____________(19)




A.
B.
C.
D.

Huong wishes she _______ free time to visit her close friend in hospital.




A.to have
B.have
C.had
D.having

Remember to turn _______ the light when leaving the office.




A.off
B.on
C.down
D.in

A.disappointed
B.reduced
C.celebrated
D.needed