Determining the mineral content of soil samples is an exacting process; _________ experts must
perform detail tests to analyze soil specimens.
A. so that B. however C. afterwards D. therefore

For the first time _________, large portions of the universe can be observed simultaneously.
A. since history B. in history
C. history began D. of the beginning of history

The issue _________ question is more complex than you think.
A. from B. at C. on D. in

It is _________ opportunity to see African wildlife in its natural environment.
A. an unique B. a unique C. the unique D. unique

He has been waiting for this letter for days, and at _________ it has come.
A. last B. the end C. present D. the moment

Some drivers seem to expect everyone else to get _________ their way.
A. away from B. out of C. off D. after

The smell was so bad that it completely _________ us off our food.
A. set B. took C. got D. put

I am not sure how old he is but he must be _________ for 70.
A. going by B. getting up C. getting on D. going off

John first dabbled_________ buying old maps for his collection.
A. on B. in C. at D. for

Tom : “I read somewhere recently that about 137 species of animals and plants become extinct
everyday.” Mary : “__________”.
A. Well, maybe all is not lost yet. B. What’s point?
C. What a pity D. It can’t have happened like that