The school rules state that no child shall be allowed out of the school during t
题型：不详难度：来源：
| The school rules state that no child shall be allowed out of the school during the day, __________ accompanied by an adult. |
答案
| D |
解析
| 连词题once一旦； when当…时候； if如果； unless除非。“学校规定白天学生不准外出除非有成人陪伴。”答案为D。 |
举一反三
They’re not playing baseball today ___________ the rain.| A．because | B．as | C．since | D．because of |
|
The bus hit the huge stone by the road heavily _________ he could stop it.
A. after B. before C since D. until |
. he made up his mind, nothing could change it.| A．Before | B．Unless | C．When | D．Once |
|
__________ printed, this science fiction will be popular among the students. | A．Before | B．Unless | C．Although | D．Once |
|
------What do you think of her?
------I thought her nice and honest I met her.| A．the first time | B．for the first time | | C．first time | D．by the first time |
|
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