______ your precious help, I wouldn’t have certainly overcome most of the practical difficulties




A.If not
B.Provided
C.Unless
D.Without

Migratory patterns in births ______ term of seasonal changes.




A.in usually be explained
B.can be explained usually in
C.can usually be explained in
D.can be explained in usually

Only if these conditions are fulfilled ______to the next stage.




A.can the application proceed
B.the application can proceed
C.the application proceed
D.do the application proceed

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
Manufacturers often sacrifice quality _________.




A.in place of to earn more money
B.and instead earn a bigger amount of money
C.for a larger profit margin
D.to gain more quantities of money

Grover Cleveland was the only American president served two nonconsecutive terms.




A.the only
B.served
C.nonconsecutive
D.term

Chọn phương án đúng (ứng với A hoặc B, C, D) để hoàn thành mỗi câu sau.
They would ______ go by air than travel by train.




A.always
B.better
C.prefer
D.rather

Chọn phương án đúng (ứng với A hoặc B, C, D) để hoàn thành mỗi câu sau.
Anne: “Thanks for the nice gift!” John: “______”




A.I’m glad you like it.
B.But do you know how much it costs?
C.In fact, I myself don’t like it.
D.You’re welcomed.

The word “Once” in the fourth paragraph is closest in meaning to _________.




A.before
B.since
C.after
D.while

After many year of unsuccessfully endeavoring to form his own orchestra, Glenn Miller finally achieved world fame in 1939 as a big band leader.




A.requesting
B.trying
C.offering
D.deciding

The scientists succeeded in finding a vaccine for that disease.




A.The scientists were able to find a vaccine for that disease.
B.The scientists were finding a vaccine for that disease.
C.The scientists should have found a vaccine for that disease.
D.The scientists couldn't find a vaccine for that disease.