The volunteers a lot of help to the community for nearly ten years.

ing to the recent regulation,it is required that any chemical plant that_______ along the river _______ tobuild a recycling center for the waste.

Is ________48 hours________ the man- made satellite ________ is made in our country to orbit the planet around?

Passengers are permitted ________only one piece of hand luggage onto the plane.[ ]

was extremely hot last summer ,it was the hottest summer of the last 50 years