In modern times, the development of science is  ________ .

Our kitchen needs to be equipped with a special fan to _________ the smell of cooking.

As nobody here knows what’s wrong with the machine, we must send for an engineer to _______ the problem.

At the end of the meeting the audience is invited to ______a question to our visiting speaker.

As you can see, the number of cars on roads _______ rising these days.