The letter _____London, May 24th, 1898 .
| A．is dated from | B．was dated in | C．dated in | D．dated from |
（2014届山东省桓台第二中学高三4月检测考试英语试卷）
It suddenly occurred to me I hadn’t locked my door．
| A．which | B．where | C．that | D．whether |
（届陕西省西工大附中高三第六次模拟英语试卷）
—Mom, can I go out and play with my friends now?
—No, honey, you can’t _____ you haven’t recovered from the knee injury.
| A．until | B．before | C．as | D．unless |
（届四川省成都七中高三三诊模拟英语试卷）
With a special train ticket, you can travel______ you’d like to go in England for just over 100 pounds.
| A．what | B．in which | C．where | D．which |
He had his camera ready _____ he saw something that would make a good picture.
| A．even if | B．if only | C．in case | D．so that |
The police officers in our city work hard _____ the rest of us can live a safe life.
| A．in case | B．as if | C．in order that | D．only if |