题目内容

_____________ a rise at the opening of the Russian stock market today, experts estimate the current situation as not very favorable.

A. however
B. because
C. although
D. despite

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An international committee issued a depressing forecast of how human beings and natural ecosystems will be influenced in the future, _____________the effects of global warming intensify.

A. as
B. however
C. besides
D. despite

It is easier to study animals and plants than human beings _____________ plant and animal behaviors can be controlled and monitored.

A. because
B. due to
C. however
D. thus

_____________ computers, ecologists have simulated communities containing various plants and animals.

According to
B. For
C. Since
D. By means of

_____________ children get older, their questions get harder to answer.

As
Because of
C. However
D. In case

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