Nearly all animals migrations happen for one reason only-______.
A. survives
B. survive
C. surviving
D. survival
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The teacher wasn’t happy because ______ know the answer.
A. no one
B. anyone
C. someone
D. everyone
_______is one of the most important inventions, because it made it much easier tolive and work in very hot parts of the world.
A. Refrigerator
B. Internet
C. Air conditioner
D. Airplane
We are pleased to announce that the 12th annual meeting will____ at our college.
A. take place
B. held
C. replace
D. set up
ALS has no _______ treatment or cure yet, so it is a serious disease.
A. efficient
B. effective
C. dramatic
D. effect