Our math teacher often tells interesting stories. He is very _______.

You'd better ________ carefully.

Either Jim or Tom ________ hard.

They travel at about 240 kilometres ________ hour.

Today's trains are much _______ than before.

I love ________.

That man is working ________ a book.

Today's trains travel ________ about 240 kilometres an hour.

Here comes the bus! Let's get ________ the bus.

In America, most students go to school ________ the school bus.