The weight-loss pills really ______ and she is becoming slimmer and slimmer.
A．worksB．workC．is workingD．has worked
B
考查動(dòng)詞。work用作系動(dòng)詞,作“起作用”之意，故選B。句意：減肥藥真的很起作用，她變得越來越苗條了。
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