这些学习策略主要针对包括英语在内的外语学习。(aim at; include)

单项选择题Americans used ______ gallons of water each day in 1980.

单项选择题Noise below the level of 85 decibels ______.

单项选择题Ⅰ. 完形填空 Close 阅读下列短文，从每小题所给的A、B、C、D四个选项中选出一个最佳选项。

单项选择题Air pollution is caused by ______.

单项选择题Ⅰ. 完形填空 Close 阅读下列短文，从每小题所给的A、B、C、D四个选项中选出一个最佳选项。

填空题worry

单项选择题How long has Kaka not played football because of his foot injury

问答题冬天，露西常常抱怨说她再也受不了伦敦有阴又冷的天气。(no longer)

单项选择题It takes ______ water to make a car than to make one pound beef.

单项选择题Some workers become deaf because of ______.