I usually use my computer _________my emails and buy tickets.

I like English very much, so I ________ read English in the morning.

Excuse me, but is that my passport?—Oh, sorry, I took ________ by mistake.

Sheldon could have defeated Howard in the match, but he _______ too careless at the last minute.

I want to be a computer manager.－_______. I am studying computer science very hard. [ ]