providing entertainment, the websitealso turns out to be a helpful learning tool

They only stood there with their arms ______in front of their chest rather than give us a hand.

I want to give up English. It’s too difficult-Come on. We know we won’t make it hard work.

For miles around me there was nothing but a desert, without a single plant or tree ______

The population of Africa is____ so rapidly as to cause concern of the whole world.[ ]