pp-1-90&110

90.The amount of money generated by a nation in a year in the forms of wages, rents, interest, and profits is known the national income.

known the--->known for the or known as the

110. A drought is a period of dry weather that last too long enough to cause a serious imbalance in the water cycle.

lasts too long--->last so long, I know "so..as to..", but so ..enough to...??笨笨地ask

90.  known as...

110.  去掉too, 不要加so,