No matter ______ the CRH accident in Wenzhou, it had and will have much warning significance.
| A．how the investigators said caused |
| B．what the investigators said caused |
| C．why the investigators said caused |
| D．the investigators said how caused |
— How do you go to work, Tom?
— ．Usually by bike，but I take a bus in bad weather．
| A．Don’t mention it | B．It doesn’t matter |
| C．Forget it | D．It depends |
It is _____ great pleasure for me to come to ______ College of Europe and meet with faculty members and students.
| A．the；the | B．a；the | C．a；不填 | D．the；a |
— Do you know _______ they got to know each other?
— It was last year_______ they both taught Chinese in Canada.
| A．When it was that, when | B．when it was that, while |
| C．When it was that, that | D．When it was that, as |
the players didn’t have a good rest shouldn’t be all excuse for losing the game．
| A．That | B．What | C．Why | D．Whether |
According to the latest investigation，most mistakes be prevented if students are careful enough．
| A．must | B．can | C．have to | D．need |