18．-It has been so foggy recently．
-Cheer up!The fog               to clear up from tomorrow．（　�。�
A．expectsB．is expected
C．will expectD．will be expected

分析 ---最近霧一直很大．
---高興點吧．預(yù)計從明天開始霧會散去．

解答 答案：B．
fog為無生命的事務(wù)，應(yīng)用被動語態(tài)，表示"被預(yù)計"，排除A和C；句子表達的是（現(xiàn)在）預(yù)計從明天開始霧會散去，用一般現(xiàn)在時；be expected to do意為預(yù)料，表示理論上的一種可能性；will be expected to則表示明天將會預(yù)計；所以排除D；故選B．

點評 對于時態(tài)的運用除了考慮時間狀語之外還要結(jié)合句子的意思以及邏輯關(guān)系，包括一些常用表達方法，要使表達出來的句子符合英語思維的習(xí)慣．

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