3. ________ twice, the postman refused to deliver our letters unless we chained our dog.

A. Being bitten          B. Bitten                   C. Having bitten        D. To be bitten  

【解析】B。根據(jù)句意，句子主語the postman與動(dòng)詞bite之間為被動(dòng)關(guān)系，所以首先可排除選項(xiàng)C；再根據(jù)句意（尤其是注意關(guān)鍵詞twice）可知，表示正在進(jìn)行選項(xiàng)A和表示將要發(fā)生的選項(xiàng)D均不合題意。全句意為：郵遞員被狗咬了兩次之后要我們把狗拴起來，不然就不給我們送信了。

4. ________ and short of breath, Andy and Ruby were the first to reach the top of Mount Tai.

A. To be tried            B. Tired                    C. Tiring                  D. Being tired

【解析】B。首先要注意tired與tiring的意思有區(qū)別：前者表示“感到疲勞的”，后者表示“令人疲勞的”或“累人的”，根據(jù)句意，顯然不宜用tiring，故可排除C；由于是與形容詞短語short of breath相并列，所以應(yīng)選形容詞tired。句意為：雖然累得上氣不接下氣，但安迪和魯比是最先到達(dá)泰山山項(xiàng)的。

5. Michael’s new house is like a huge palace, ________ with his old one.

A. comparing            B. compares              C. to compare           D. compared

【解析】D。compared with為英語慣用表達(dá)，其意為“與……相比”。又如：Compared with many women, she was indeed very fortunate. 和許多女人相比，她的確算是很幸運(yùn)的了。

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