Geometry, ______ I know nothing, seems a very dull subject.
A. that
B. about that
C. which
D. about which
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The highest temperature ______ in any furnace on earth is about 10,000 centigrade.
A. we can get
B. that we can get it
C. which we can get it
D. what we can get
We sent the horses to a considerable distance, ______ they should disturb the children.
A. less
B. lest
C. last
D. least
Sound is conducted through steel in the same manner ______.
A. as in air
B. as through air
C. as air does
D. like air
_____ he was putting on his uniform, the officer found that one of the sleeves was torn.
A. Since
B. Unless
C. As
D. Before