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【简答题】
形成酸雨的主要物质是什么?现取一份雨水样，每隔一定时间测其pH，数据如下： 说明雨水样pH变小的主要原因。正常雨水的pH为6～7，以上所取的雨水已大大偏离正常值，会给环境带来哪些危害?
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【单选题】The exciting news he had been looking forward ___ at last, so he did nothing but____.
A.
to came; cry
B.
to coming; cry
C.
to come; to cry
D.
of come; to cry
【单选题】At last we found the house ____ he had been living .
A.
in that
B.
in which
C.
at which
D.
on which
【单选题】The day he had been looking forward to _____at last.
A.
coming
B.
came
C.
had come
D.
have come
【简答题】He had at last been___to send afax. prefix="o" ns="urn:schemas-microsoft-com:office:office"? ?xml:namespace>A. adimtted B. let C. left D. given permission
【单选题】The general at last got a chance to visit the village ____ he used to fight, _____ he had been dreaming of for years. [ ]
A.
that/which
B.
where/that
C.
in which/what
D.
where/which
相关题目：
【单选题】The day he had been looking forward to _____at last.
A.
coming
B.
came
C.
had come
D.
have come
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