The Changbaishan Mountains have a huge variety of scenery, some of the best of__________can only be reached on foot.
The computer system __________ suddenly while he was searching for information on the Internet.
Someone is ringing the doorbell . Go and see ______?
_______ from what he said and did , Mr White is a doctor.
Early to bed and early to rise ______ a man healthy, happy and wise.
---Let’s go for an outing this weekend . --- __________.