it is 18 o'clock now.but mr green is s( ) working at school.

It's twelve o'clock at night,but he is _______ working. It’s seven o’clock now.What time is it? ___ is piano lesson?It's at four o'clock. What time is it now?A.At five o'clock.B.At half past five. 用介词填空 It's nine o'clock.Tom is late ( ) school.(2)The clock is it It's 12 o'clock What time is it now?it's ______ seven o'clock,lt's time to g What () is it now? It is 9 o'clock. It is 11 o’clock now ,but Tom has not finished his homework He is tired.He is on the s().It's seven o'clock.They are at “It is 5 o'clock now.don't you think it's about time we went -----it is 9o'clock now.i must go.-----it's raining outside.