（届北京市海淀区高三下学期期中练习英语试卷）
You cannot take back your words ______ they are out of your mouth.
| A．before | B．whether | C．once | D．while |
--- It’s five years since I was a singer.
--- Not really! ?
| A．Are you a singer | B．How’s that |
| C．What do you mean | D．Is it a strange idea |
--- What do people wear when they go to the theatre?
--- Well, it isn’t very . People can wear anything they like.
| A．formal | B．certain | C．modern | D．simple |
Regulations require needs special diets the cooking manager in advance.
| A．who; informs | B．whom; informed |
| C．whomever; inform | D．whoever; inform |
Because he was the new limit, he was stopped and wanted for speeding.
| A．good at | B．tired from | C．unaware of | D．uninterested in |
Some blood types are quite common, others are regionally , and still others are rare everywhere.
| A．distributed | B．contributed | C．obtained | D．Convinced |