11. After _________ seemed ages, the newsman disclosed the facts.
A. there
B. which
C. what
D. that
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12. Our school is no longer _______ it was 10 years ago, _________ it was not well equipped.
A. what; which
B. that; which
C. what; when
D. that; where
13. Our bad living habits will destroy the earth. Only by changing ________we live can we save the earth.
A. that
B. what
C. how
D. where
14. Thinking that you know _________ in fact you don’t is a serious mistake
A. what
B. that
C. when
D. however
15. Energy is _________ makes things work.
A. what
B. everything
C. something
D. anything