As we were asleep, ＿＿ of us heard the sound .
| A．both | B．none | C．all | D．any |
.
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 |
.
On average, there are 800 tornadoes in the U.S. each year, _______ about 80 deaths and 1,500 injuries.
| A．cause | B．caused | C．to cause | D．causing |