1.I didn’t manage to do it _____ you had explained how.
A.until B.unless C.when D.before
答案:A
答案解析
not…until…結構。【譯文】 直到你解釋如何做后我才能做好它。
2.Until the present century, ________ demand for natural gas.
A.little B.and little C.there was little D.was there little
答案:C
答案解析
本句考查there be句型，until the present century為狀語從句，本句只是把狀語從句置于句首，無需倒裝，否定連詞not until引導狀語從句時需倒裝。【譯文】 直到本世紀才對天然氣有要求。
3. Please write your composition ________ line to leave space for the teacher's correction .
A.one another B.every other C.any other D.each other
答案:B
答案解析
every other…每隔一個／每兩個。one another:彼此、互相；any other:任何；each other：互相、彼此【譯文】 請寫作文時隔行寫，以便留出空間供老師批改。
4. The cost of oil is less than _______ of gas.
A.it B.one C.the one D.that
答案:D
答案解析
that of gas中的that指代的是前句中的cost 【譯文】 油的成本比氣的成本要低。
5. ______ was the situation we were facing .
A.So B.Such C.What D.It
答案:B
答案解析
such代替前面所說的情況。【譯文】 這就是我們面對的形勢。
