The old town has narrow streets and small houses _____are built close to each other．
A．they B．where C．what D．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
