【单选题】【消耗次数：1】
______hewasoutoftheroom,heturnedbackandknockedattheteachersdooragain.
①
Before
②
Since
③
Assoonas
④
Until
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相关题目
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Agreatnumberofcollegesandfactories____since1949.
①
hasbeenestablish
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havebeenestablished
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haveestablished
④
hadbeenestablished
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Since the road is wet this morning, ____ last night. ?
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it must have rained ?
②
?it must rain ?
③
it must be raining ?
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it must have been rained?
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①
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随机题目
【单选题】
3000元，其摘要任务的固定成本是（）
①
子任务中最高的固定成本即3000元
②
各子任务固定成本之各即7500元
③
7500元+摘要任务本身的固定成本
④
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【单选题】
优先级用于设置任务的优先情况，其值为（）。
①
用英文26个字母表示，越往后越级别高
②
介于1-1000之间的整数，数字越大级别越高
③
介于1-100之间的数字，数字越大级别越高
④
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