题目内容
Many scientists believe that global warming,if ________ ,will cause extreme climate changes this century.
A. not stopping B. not stop
C. not stopped D. without stop
C
考查状语从句的省略。if后省略了主语及动词be。
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题目内容
Many scientists believe that global warming,if ________ ,will cause extreme climate changes this century.
A. not stopping B. not stop
C. not stopped D. without stop
C
考查状语从句的省略。if后省略了主语及动词be。