( ) 1. It took me ＿＿＿＿＿ hour to do my homework yesterday.
A. a B. an C. the D. /
( ) 2. ---What is he doing for vacation? --- He’s ________ her brother.
A. babysit B. babysat C. babysitting D. babysitted
( ) 3. Mike is very popular in our school, and _________ knows him.
A. everything B. something C. nobody D. everybody
