1 . Steve Jobs took the trouble ________ a calligraphy class, though none of ________ he learned in it seemed to have practical application in his life.

A．to attend……which	B．to attend…what
C．attending…what	D．attending…which

2 . 这些所谓“不可教”的学生不应该为前任老师不合适的教学方式背锅。(blame) (汉译英)

3 . 解决这个烦人问题的方法是好好平衡工作和休息。

__________ working out this annoying problem is to __________ well.

4 . ______ with motor neuron disease in 1963 at the age of 21, Hawking was expected ______ for only two more years.

A．Having diagnosed … to have lived	B．Having diagnosed … to live
C．Diagnosed … to have lived	D．Diagnosed … to live

7 . Based on past experiences, it takes four to five years after economic recovery for unemployment ________ to pre-crisis levels. (return) (所给词的适当形式填空)