5．From the tears in Nancy's eyes we know that something sad ______．（　�。�
A．may happenB．would happen
C．must have happenedD．should have happened

分析 從Nancy眼中的眼淚我們知道肯定有什么傷心的事件發(fā)生．

解答 答案是C．本題考查表示推測(cè)的情態(tài)動(dòng)詞的用法．may/might表示推測(cè)往往出現(xiàn)在肯定句或否定句中表示不太肯定是推測(cè)"也許"；情態(tài)動(dòng)詞would表示"過去常常；過去準(zhǔn)會(huì)"；情態(tài)動(dòng)詞must表示推測(cè)只能出現(xiàn)在肯定句中，表示有客觀依據(jù)的推測(cè)"準(zhǔn)是，一定是"．should表示推測(cè)時(shí)往往表示"按照常理常規(guī)的推測(cè)"，表示"按照道理應(yīng)該…"；should have done常常表示"過去本應(yīng)該做但實(shí)際上沒有做"．本題說明的是現(xiàn)在，所以排除B和D；且由上文的客觀依據(jù)"Nancy眼中的眼淚"，推測(cè)"肯定有什么傷心的事件發(fā)生"，所以答案是C．

點(diǎn)評(píng) 要在正確理解情態(tài)動(dòng)詞的基本含義的基礎(chǔ)上，整體理解語境中的情感態(tài)度，做出合理的判斷．

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