—Jack can't concentrate on his lessons recently.

—Yes, that might ____ why he did so badly in the last test.

A．answer for

B．apply for

C．call for

D．account for

古诗文默写。

小题1:长风破浪会有时，                     。（李白《行路难》）

小题2:                     ，铜雀春深锁二乔。（杜牧《赤壁》）

小题3:诗歌中有情趣，亦有理趣，耐人寻味，令人深思。刘禹锡在《酬乐天扬州初逢席上见赠》中借“                     ，                ”揭示了新事物必将取代旧事物的深刻哲理；王安石在《登飞来峰》中以“             ，              ”一句传达了高度决定视野的哲理意蕴；王湾在《次北固山下》用“         ，         ”巧妙地点出了时序更替的自然理趣。