I have to ____my diet rather than eat the same all the time.，so that I can keep fit.
| A．differ | B．vary | C．contiune | D．range |
.
.It is difficult to_______a conversation with someone who only says "Yes" or "No".
A. keep up B.hold up c.pick up D.make up
.
It seems to me that______little money he earns hardly supports______family as large as hi:
A．the;a B．a；the c．不填；a D．不填：the
.
_______ , the firemen put all the fires out quite quickly.
| A．Sadly | B．Hopefully | C．Unfortunately | D．Thankfully |
.
---How did you know the surprising news?
---I happened _______ the event then.
| A．to be covered | B．to have covered | C．to be covering | D．to cover |
.
---Is that the small town you often refer to?
---Right, just the one _______ you know I used to work for years.
| A．that | B．which | C．where | D．what |