Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
_____at the Isthmus of Panama, so animals were able to migrate between North and South Ameria .
A.When a land bridge existed
B.A land bridge existed                   
C.A land bridge
D.With a land bridge

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
Despite all the interruptions, he _____ with his work.
A.pressed on
B.held on
C.stuck at
D.hung out

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
All her hard work paid _____ in the end and now she is very successful.
A.off
B.up
C.out
D.back

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
People can become very _____ when they are stuck in traffic for a long time.
A.bad-tempered
B.nervous
C.stressful
D.pressed

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
If you really _____, can you reach that book on the top shelf?
A.sprawl
B.stretch
C.lengthen
D.expand

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
Hardly had we started the picnic _____ the rain began pouring down.
A.that
B.than
C.and
D.when

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
Governments should _____ international laws against terrorism.
A.bring up
B.bring back
C.bring in
D.bring about

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
Nothing _____ the ordinary ever happened here.
A.within
B.about
C.out of
D.from

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.
The amount of oxygen and nitrogen in the air almost always remain stable, but the amount
                                  A                                                                         B
 of water vapor vary considerably.
            C                     D         
A.
B.
C.
D.

Mark the letter A, B, C or D on your answer sheets to indicate the word or phrase that is OPPOSITE in meaning to the underlined word (s) in each of the following questions.
We need an immediate decision! We have to decide what to do now.
A.instant
B.early
C.delayed
D.alternative