你不小心踩到别人时,你应该对他(她)说: A.It’s great. B.I don’t know. C.I’m sorry.
The computer is in my __________ room.
–Is this your ruler? – Yes, it’s ________
Please call Mike ________ 578-4317 .
–_______ do you spell pencil? - P- E-N-C-I-L.
–Are these your rulers? – Yes, ________.