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。
My wallet is nowhere to be found.I_____it when I was on the bus.
If he_____the storekeeper ‘s scissors ，he would have forgotten to buy a pair.
Being extremely_____to the cold ，I do not like skating.
Thosepeople_____ageneralunderstandingofthepresentsituation.
_____all the representatives still not there ，the meeting was postponed for several hours.
