( ) My mother works _____ a bank . A. in B. on C. at
( )—Can you sing a song in English? —No, I __________.
( ) He has two basketballs. One is new, __________ is old.
( ) Bruce, look at your dirty shoes. You’d better __________ them right now.
( ) I met Jack on way home yesterday.
( ) It’s hot __________ summer in Beijing.