My grandfather is such a forgetful person that he has to _______ many things, even his daily meals. [ ]

The science of computer, _____rapid progress has been made in recent years, is the most important of all science.

You _________ get up so early. It’s weekend today.

Can you come to my birthday party tomorrow evening––If Tony _____, _____________.

Can we finish our task by the weekend?— It all depends on ______ we can get MrSmith’s cooperation.[ ]