16．We _weigh the pros and cons before deciding whether to invest our money or let it stay in the bank．（　�。�
A．canB．wouldC．mustD．dare

分析 在決定是否投資還是讓錢(qián)呆在銀行前我們必須權(quán)衡利弊．

解答 答案C  本題考查情態(tài)動(dòng)詞  根據(jù)句意可知，空白處應(yīng)該表示"必須"的意思，所有應(yīng)該使用must，故答案為C

點(diǎn)評(píng) 對(duì)于情態(tài)動(dòng)詞的學(xué)習(xí)應(yīng)該熟悉每個(gè)情態(tài)動(dòng)詞所表達(dá)的意義，特別是一些特殊情況的用法，根據(jù)句意來(lái)選擇正確的答案．

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