In a sports team each player has a clear role，and there are few occasions ________members are confused or uncertain about their roles.
| A．whose | B．that | C．when | D．which |
His uncle went abroad in 2010, and ________since.
| A．has not been heard of |
| B．had not been heard of |
| C．had not heard of |
| D．has not heard of |
It is required in the library regulations that any book borrowed __________ by due time, or the borrower will be fined.
| A．return | B．be returned |
| C．returns | D．is returned |
I broke my relationship with John because he always found _______ with me.
| A．error | B．mistake | C．fault | D．failure |
His new car, ________ he paid 7,000pounds, has already had to be repaired.
| A．on which | B．on that |
| C．for that | D．for which |
Your failure in the final exam is due to the fact that you didn't ______ enough importance to your English.
| A．attend | B．attack | C．attach | D．obtain |