27. I think that his advice is well worth __ .
| A．valuing | B．to be valued | C．of being valued | D．values |
—Why didn't you come to Mike’s birthday party yesterday?
---Well, I ____, but I forgot it.
| A．should | B．must | C．should have | D．must have |
I hear Mr Smith was writing a story last year and he still _____.
| A．do | B．does | C．is | D．am |
---What made her so sad?
---___she had lost her purse with a lot of money in.
| A．Because | B．Since | C．.What | D．That |
I can't tell you the exact when I will get there ____, I’ll be there as early as I can.
| A．No matter | B．Anyhow | C．Therefore | D．Besides |
Certainly I posted your letter---I remember ____it.
| A．posting | B．to post | C．to be posting | D．have posted |