----- You seem in low spirits. Anything wrong?
----- I ______ in the important exam. I let my parents down.
A．failB．failedC．has failedD．had failed
B

試題分析：考查時(shí)態(tài)。句意：—你似乎清醒低沉。出來什么事情？—我在考試?yán)餂]有考及格。我讓我的父母失望。根據(jù)句意說明我考試不及格是過去發(fā)生的事情，故使用一般過去時(shí)。故B正確。
點(diǎn)評(píng)：時(shí)態(tài)題的考查關(guān)鍵是抓住句子的上下文含義和句中的時(shí)間狀語。要根據(jù)時(shí)間狀語來選擇合適的時(shí)態(tài)，在平時(shí)的學(xué)習(xí)中要注意積累有關(guān)時(shí)態(tài)的用法和各種時(shí)態(tài)的特殊之處。如since， so far等經(jīng)常與現(xiàn)在完成時(shí)連用
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