Cultural tradition is _____________ a continuum that the humans create and pass on generation after generation.
A. such
B. so
C. as
D. very
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_____________ 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
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