7．The ground iscovered（cover） with snow．

分析 地面被積雪所覆蓋著．

解答 covered 考查動詞的形式．cover與句子的主語The ground是被動關(guān)系，所以句子是被動語態(tài)，因為被動語態(tài)中的動詞是過去分詞形式，故填covered．

點評 本題考查謂語動詞的形式．分析句子的主動還是被動是解題關(guān)鍵，另外平時要加強對動詞的過去分詞的記憶．

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