题目
A.in
B.on
C.at
D.by
第1题
A.No, they aren't μ
B.No, they ares
C.Yes, they are。
D.Yes, they aren'tu
第4题
第5题
A.vacancies
B.vacations
C.titles
第6题
A.much
B.many
C.lots of
第7题
A.Why species don't avoid extinction by adapting.
B.Why species become extinct at the rate they do.
C.Why humans aren't extinct.
D.How many species aren't extinct.
第8题
A.A. offered
B.B. provided
C.C. existent
D.D. available
第9题
A.much
B.so
C.very
D.too
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