—How many students are there in the classroom?—_________. They are all in the lab.

The settlement is home to nearly 1,000 people, _____ left their village homes for a better life in the city.

Many people have been ill with a strange disease these days, _______ we’d never heard of before.

 According to the weather forecast, it will be _____weather that we had better stay at home.

 I hate ________ when someone makes a mess of my learning materials on my desk.