单项选择题

__________ his work, he would do it till it was finished.

A．Once Charles would start
B．Once Charles started
C．Since Charles would start
D．Since Charles started

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单项选择题

Reading is learning, but applying is also learning and the more important kind of learning at that.

A．看书是学习，但是应用也是学习，同时更重要的学习种类是那样。
B．读书是学习，使用也是学习，而且是更重要的学习。
C．阅读是学习，但是实施也是学习，更重要的学习种类在那点上。
D．读书是学习，但使用也是学习，并且是更重要种类的学习。

单项选择题

In what ways are elephants like the human beings（）

A．They never forget great sadness or great happiness.
B．They live in families of females.
C．They live together for a long time.
D．They have daughters, mothers and grandmothers.