Professor James will give us a lecture on the Western culture, but when and where _______ yet.
A．hasn’t been decidedB．haven’t decidedC．isn’t being decidedD．a(chǎn)ren’t decided
A
考查時(shí)態(tài)及主謂一致。主語when and where作主語，謂語動(dòng)詞用單數(shù)，根據(jù)yet可知為現(xiàn)在完成時(shí)，選A。
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