The situation is getting worse. We must __________ the trouble _____________.
A．keep; spreadingB．prevent; spreading
C．stop; to spreadD．protect; to spread
B
考查詞組：阻止…做…keep/stop/prevent sb from doing其中除了keep以外，其他動(dòng)詞后面都可以省略from，所以選B，句意是：形勢(shì)越來越嚴(yán)重，我們必須防止麻煩蔓延。
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