What the science teacher does and says       of great importance to college students.
A．a(chǎn)reB．isC．wereD．was
B

試題分析：考查謂語動(dòng)詞單復(fù)數(shù)，句子作主語時(shí)，謂語動(dòng)詞用單數(shù)，句子意思“學(xué)科老師所做的和所說的對(duì)于大學(xué)生很重要”，所以選B
點(diǎn)評(píng)：句子What the science teacher does and says是個(gè)從句，引導(dǎo)詞是what，做整個(gè)句子的主語，短語of great importance相當(dāng)于一個(gè)形容詞important。
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