---I’m sorry I broke the vase．

  ---0h．______．It wasn’t very expensive．

     A．you’d better not      B．I’m afraid not

     C．as you wish         D．that’s all right

Find ways to praise your children often，____you’ll find they will open their hearts to you． 

A．till    B．or   C．and     D．but

The two girls are so alike that strangers find ___ difficult to tell one from the other． 

A．it    B．them     C．her     D．that

They are broadening the bridge to ____ the flow of traffic．

     A．put off    B．speed up    C．turn on    D．work out

I'm afraid he’s more of a talker than a doer, which is ____ he never finishes anything．  

A．that    B．when     C．where    D．why

Look over there--- there’s a very long，winding path _____up to the house．

     A．leading    B．leads     C．led     D．to lead

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

---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

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

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