Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word for each of the blanks.
Any change in one part of an ecosystem can cause changes in other parts. Droughts, storms and fires can change ecosystems. Some changes (29) _________ ecosystems. If there is too (30) _________ rainfall, plants will not have enough water to live. If a kind of plant dies off, the animals that feed on it may also die or move away. Some changes are good for ecosystems. Some pine forests need fires for the pine trees to reproduce. The seeds are sealed inside pinecones. Heat from a forest fire melts the seal and lets the seeds (31) _________. Polluting the air, soil, and water can harm ecosysterms. Building (32)_________ on rivers for electric power and irrigation can harm ecosystems around the rivers. Bulldozing wetlands and cutting down forests destroy ecosystems. Ecologists are working with companies and governments to find better ways of (33) _________ fish, cutting down trees, and building dams. They are looking for ways to get food, lumber, and other products for people without causing harm to ecosystems.
(29) _________
A.harms
B.harmful
C.harmless
D.harm

Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.
A.initiative B. C. D.
B.interview
C.communicate
D.suitable

Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions.
She is always extremely deferential to anyone in authority.
A.opposing
B.superior
C.polite and respectful
D.of different levels

Mark the letter A, B, C, or D to indicate the word that is OPPOSITE in meaning to the underlined part in each of the following questions.
The US troops are using much more sophisticated weapons in the Far East.
A.complicated
B.difficult to operate
C.simple and easy to use
D.expensive

Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the rest in the position of the main stress in each of the following questions.
A.successful
B.acknowledge
C.continue
D.physical

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
Before the end of the term, I ____ all the required reading. Giải thích: must have done sth: chắc hẳn đã làm gì should have done sth: đáng lẽ nên làm gì must + V: phải làm gì needn’t + V: không cần làm gì Ví của Frank đang nằm trên bàn cà phê. Anh ấy hẳn đã để nó ở đây tối qua. Đáp án:A
A.had finished
B.had been finished
C.was finished by
D.had been finished by

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
Dang “ Would you like to drink a cup of coffee, Nam?” Nam “ ____.”
A.Yes, I would
B.Yes, thank you
C.No, I would not
D.Yes, please

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
Either you or your friend ____ on charge today.
A.are
B.was
C.were
D.is

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
John could not continue the match ____ his badly injured leg.
A.as
B.since
C.because of
D.because

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
____ I had learnt English when I was at high school.
A.Unless
B.If
C.Even if
D.If only