8．Who__________？There's too much noise．I can not read my books any more．（　�。�
A．does singB．is singC．will singD．is singing

分析 誰在唱歌？噪音太多了．我沒法讀書．

解答 答案：D．
根據(jù)設(shè)空處后面的句子There's too much noise 結(jié)合語境推測問句的句意是"誰在唱歌？噪音太多了．我沒法讀書．"，由此判斷設(shè)空處的動作在說話時刻正在進(jìn)行著，所以用現(xiàn)在進(jìn)行時．現(xiàn)在進(jìn)行時的構(gòu)成是：主語+am/is/are+動詞的現(xiàn)在分詞；主語是who，be動詞用is，故答案為D．

點評 本題考查了動詞的時態(tài)．做題時，一定要特別關(guān)注有關(guān)的時間短語，這是判斷句子時態(tài)的標(biāo)志．在沒有時間狀語的情況下可以聯(lián)系上下文根據(jù)語境來做出正確判斷．

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