2．However frequently he____in doing the experiment，he never loses his confidence．（　�。�
A．defeatB．was defeatedC．will defeatD．gets defeated

分析 他不管做這個(gè)實(shí)驗(yàn)失敗多么頻繁，他從來沒有失去信心．

解答 答案：D 考查一般現(xiàn)在時(shí)態(tài)．根據(jù)主句用了一般現(xiàn)在時(shí)態(tài)，從句也就用一般現(xiàn)在時(shí)態(tài)．defeat是及物動(dòng)詞，用get/be defeat形式，排除A、C項(xiàng)；而B項(xiàng)用一般過去時(shí)態(tài)，故只有D項(xiàng)正確．

點(diǎn)評(píng) 解答此類問題要了解各種時(shí)態(tài)的基本含義，并區(qū)別各種時(shí)態(tài)之間的差異，了解某些時(shí)態(tài)的特殊用法，然后結(jié)合語境選擇正確答案．

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