I will accept late work, ________I will reduce the grade by 5%

Whitney Houston’s sudden death suggests that drug abuse is such a serious problem ______ we shoulddeal with properly.[ ]

I___ Beijing in a few daysDo you know when the earliest plane ____ ?

It is not_______ for me to return all thebooks to the library now because I still need them

I have many penfriends, but ________of them are foreigners.