That is a watch of ____ .

There are many hills in the country. A train usually goes ______ tunnels.[ ]

We feel our duty to make our country a better place.

We had _______ 8-day holiday during this National holidays, but some of us felt unhappy because of _________heavy traffic on the highways.

The survey shows that 200 students do different things during their vacations. ______ of them take classes according to the survey.