【单选题】
Some()per cent of secondary schools in England are grant-maintained (GM)self-governing schools.
A、10
B、15
C、20
D、25
A、10
B、15
C、20
D、25
A、feet per feet of breadth B、feet per feet of length C、inches per feet of breadth D、inches per feet of length
A、The direction of traffic flow B、The direction of current C、The direction of monsoon D、The direction of wind
A、less than 100 parts per million B、more than 100 parts per million C、at least 100 parts per million D、100 parts per million