( ) 16.Her parents will come back ________________ two weeks.
A.after B next C.in D later
( ) 17.Things will get better in the future, we will have ______ cars and _______ pollution.
A.less, more B. Fewer,less C. more, more D.less, fewer
( )18.The boy is ______to go to school .
A. enough old B. enough young C. old enough D.young enough
( )19.There are about five ____ young trees on the hill.
A.after B next C.in D later
( ) 17.Things will get better in the future, we will have ______ cars and _______ pollution.
A.less, more B. Fewer,less C. more, more D.less, fewer
( )18.The boy is ______to go to school .
A. enough old B. enough young C. old enough D.young enough
( )19.There are about five ____ young trees on the hill.