When you stand on the top of the mountain and overlook the surrounding scenery,you’ll find it is________to climb it up with effort.
Most Saturday evenings they cook meals ___ open fire outside.
_____ in the queue for half an hour,Tom suddenly realized that he had left his wallet at home.
The library needs _____,but it’ll have to wait until Friday.
--- Catherine, I have cleaned the room for you. ---Thanks. You _______ it. I could manage it myself.
It didn’t take the children long to________ the correct answer.