他自从来到我们学校就教我们物理.
since he came to our school.
一天工作之后,他精疲力尽.
After a day's work,he was .
结果证明,谋杀案和那个工程师无关.
It turned out that the engineer the murder.
约翰太粗心了,不能照看好他的宠物.
John is look after his pets well.
老师要求我们按时上交作业.
Teachers require us to our homework on time.
The passengers (tell) just now that the highway was closed because of the heavy fog.