毫无疑问,电脑在科技和商业上是很有用的.
There is that computers are very useful in technology and business.
戴眼镜的那位女老师中等身材.
The woman teacher is of medium build.
He always asks me my homework.
他总是问我作业做完了没有.(finish)
Factories pouring polluted water into rivers and lakes.
必须阻止工厂向江河湖泊排放污水.(prevent)
Tommy the dog and broke his front teeth.
汤米被那只狗绊了一跤,磕断了门牙.(fall)
It a mountain on snowy days.
在雪天里登山是很危险的.(be)