2．There are still many problemsto be solved （solve） before we leave．

分析 在我們之前仍然有許多問題需要解決．

解答 53．to be solved
答案是to be solved．考查非謂語動(dòng)詞作定語．problems和solve之間是被動(dòng)關(guān)系，且是還沒完成的動(dòng)作，所以用被動(dòng)語態(tài)的不定式形式to be solved作定語修飾名詞problems．故答案是to be solved．

點(diǎn)評(píng) 本題考查用所給單詞的適當(dāng)形式填空．首先要根據(jù)語境明確句意，然后再根據(jù)相關(guān)語法對(duì)所給單詞在形式上做出正確的變動(dòng)．

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