单项选择题

Someone broke into the house and stole many paintings. It was a long time ______ the housekeeper discovered what had happened.

A．until
B．when
C．since
D．before

<上一题目录下一题>

热门试题

单项选择题

______ that they may eventually reduce the amount of labour needed on construction sites by 90 per cent.

A．Such construction robots are clever
B．So clever the construction robots are
C．Such clever construction robots are
D．So clever are the construction robots

单项选择题

I have my application form in my hand, but I don't know which office room ______.

A．to send it to
B．to send it
C．to be sent to
D．to have it sent

相关试题