Sorry for the delay．I got lost in the mountain．— OK．You’re safe and that’s what ．

Have you been aware _______under the tree ________ a scholar and two assistants.

Sir, you ______use your mobile phone at the gas station. It’s very dangerous.

ranger isn’t like a worker, nor _____a salesman.

He took off his coat, _____ all his pockets, but couldn’t find his key.