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.
October is the t month in a year.
Both of us do the dishes every day.(改为否定句)
us does the dishes every day.
She put the keys on the table yesterday.(改为一般疑问句)
she the keys on the table yesterday?
Mr. Smith has been in China for six years.(对划线部分提问)
has Mr.Smith been in China?
作为青少年,我们应该关爱照顾老人.
As teenagers, we should the old.