The computer system ______ suddenly while he was searching for information.
| A．broke down | B．broke out |
| C．broke up | D．broke in |
________ the fire breaks out，he is the first to arrive at the scene.
| A．Every time when | B．Moment |
| C．No matter whenever | D．Every time |
—What do you think I should wear for such a formal press conference?
—Dress ________ you like.
| A．how | B．what |
| C．whatever | D．however |
—Someone wants you on the phone.
—________ nobody knows I am here.
| A．Although | B．And |
| C．But | D．So |
We had to be patient because it ________ some time ________ we got the full results.
| A．has been；since | B．had been；until |
| C．was；after | D．would be；before |
He was so deep in thought，thinking of the problem ________ he knocked into the tree without noticing it.
| A．when | B．while |
| C．because | D．that |