---Shall I keep an eye on your house when you are on holiday? ---________.
| A．It’s up to you | B．Of course you should |
| C．If you should like | D．I would appreciate that |
When I got on the bus，I_____I had left my wallet at home．
| A．was realizing | B．realized | C．have realized | D．would realize |
I'm sorry I didn’t phone you，but I've been very busy_____ the past couple of weeks．
| A．beyond | B．with | C．among | D．over |
---Are you going to Tom’s birthday party?
---________．I might have to work．
| A．It depends | B．Thank you | C．Sounds great | D．Don’t mention it |
He had his camera ready ____he saw something that would make a good picture．
| A．even if | B．if only | C．in case | D．so that |
Look over there--- there’s a very long，winding path _____up to the house．
| A．leading | B．leads | C．led | D．to lead |