单项选择题
A. hadn't caused ; had B. didn't cause ; did C. hasn't caused ; did D. hasn't caused ; has
—Do you regret paying ten dollars for that book —No, I...
单项选择题—Do you regret paying ten dollars for that book —No, I would gladly have paid （）.
A. as twice many B. twice as many C. twice as much D. as twice much
（）he was tired, （）he still worked hard.A. Though ; butB...
单项选择题（）he was tired, （）he still worked hard.
A. Though ; but B. Though ; and C. Though ; / D. Although ; or
If we word with a strong will, we can overcome any diff...
单项选择题If we word with a strong will, we can overcome any difficulty, （）great it is.
A. what B. how C. however D. whatever
