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 not until the end of the nineteenth century ______.
A.did plant breeding become a scientific discipline
B.that plant breeding became a scientific discipline
C.that a scientific discipline was plant breeding
D.did a scientific discipline become plant breeding

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
My mother _____ strawberries for years but she has never had such a good crop before.
A.had grown
B.is growing
C.grew
D.has been growing

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
______ get older, the games they play become increasingly complex.
A.For children to
B.Children, when
C.Although children
D.As children

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
If the world’s tropical forests continue to disappear at their present rate, many animal species _____ extinct.
A.would become
B.would have become
C.became
D.will become

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
You really dropped _____ the other day when you told Brian you’d seen his wife at the cinema. He thought she was at her mother’s.
A.a plank
B.a log
C.a brick
D.a stone

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
When a fire broke out in the Louvre, at least twenty ______ paintings were destroyed, including two by Van Gogh.
A.worthy
B.priceless
C.worthless
D.valueless

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
Although we had told them not to keep us waiting, they made no _____ to speed up deliveries.
A.comment
B.action
C.attempt
D.progress

Mark the letter A, B, C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.
Leonardo is often thought of primarily as an artist, and with masterclasses such as The Last Supper and the Mona Lisa to his credit, his place in art history is assured.
A.masterclasses
B.thought of
C.place
D.to his credit

Mark the letter A, B, C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.
My uncle has gone to Nha Trang on vacation, but I wish he is here so that he could help me repair my bicycle.
A.could help
B.has gone
C.he is
D.on vacation

_______(59)
A.reduces
B.increases
C.recycles
D.raises