问题描述：
----It's a long time ( ) I saw you last.----Yes,and what a pity it is now that it will be a
----It's a long time ( ) I saw you last.
----Yes,and what a pity it is now that it will be a long time ( ) we see each other again.
A before since B since when C since before D when before
Many people consider it ( ),from which a lot of children benefit.
A a worth doing cause B a cause worth to do
C a worthwhile cause D a worthless cause
----It's a long time ( ) I saw you last.
----Yes,and what a pity it is now that it will be a long time ( ) we see each other again.
A before since B since when C since before D when before
Many people consider it ( ),from which a lot of children benefit.
A a worth doing cause B a cause worth to do
C a worthwhile cause D a worthless cause
问题解答：
我来补答展开全文阅读