life will continue on the earth for millions of years to come will depend on         the problem of pollution can be solved.
A．How /whetherB．That/thatC．Whether / ifD．Whether / whether
D
本題考查主語從句和賓語從句。做此題必須要看清楚第一空是一個主語從句，而第二空是一個介詞后的賓語從句。因此，根據(jù)句意，生命是否會在以后的幾百萬年里繼續(xù)將取決于污染問題能否被解決。二空都要填是否。但主語從句“是否”只能用whether,介詞后也只能用whether.所以選擇答案D。
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