He drove fast and arrived an hour_____of schedule.
A、inadvanceB
aheadof“提前，预先”，aheadofschedule“比规定时间提前”，正合题意。本句意为“他开得很快，比规定时间早到了1小时。”inadvance“事先，提前”，后面不跟介词。infrontof“在⋯⋯前面”，表示位置，所以此处不合题意。
Childrenwhoareover-protectedbytheirparentsmaybecome_____.
Bothofmybrothersarenowmarried，soIhavetwo_____.
The teacher gave_____the examination paper.
Copernicus maintained that the earth_____round the sun.
Both of my brothers are now married ，so I have two_____.
