It’s dangerous to swim in this river. .–Yes, you are right. The government has people not to swim in it.

Not only English but also maths _______ my favourite subject.

The invention of the Internet has ________ a lot to the development of the world.

How many students are there in your classroom now— There aren’t ______.

re were no automatic washing machines,people would have to wash their clothes ______ hand or ______ hand-operatedmachines