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( ) 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 £®