Even if his letter____tomorrow ， it____too late to do anything.
A、willarrive,,isC
「句意」即使他的信明天到也无济于事了。
「难点」在条件句中表示现在将来的时间，需要用一般现在时，主句中使用将来时。
Itisimperativethatstudents_____theirtermpapersontime.
Marytiptoedoverandtooktheclockawaybecauseshehatedtohearit___whenshewastryingtogotosleep.
Wecanhear____fromthebackoftheroom.
Hesetupinbusiness（）hisownandwasverysuccessful.
Ifnot_____withtherespecthefeelsduetohim,Jackgetsveryill-temperedandgrumblesallthetime.
