The author wishes to call ourattention ______modernmanhas polluted his environment to such an extent that he might destroy himself ifhe went on like that.
A. to that
B. in that
C. to the fact which
D. to the fact that
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Scientists have reached theconclusion _______thetemperatureon Earth is getting higher and higher.
A. what
B. that
C. which
D. when
Stopping pouring polluted waterinto the river is_______thefactoryhas to solve at present.
A. what
B. which
C. as
D. that
The mountain was______many animals, such as wolves, badgers and rabbits once haunted but now itis so silent.A.B.C.D.
A. that place
B. where
C. what
D. then
The reason for my return is______I left my keys behind.
A. because
B. it
C. that
D. why