Young men should constantly _________their own state of mind so as to adapt to the circumstances in which fierce competition is going on .

The government has announced that a modern city will be set up in ____is still a wasteland now .

Playing QQ’s “Happy Farm” by planting, watering, fertilizing, spraying, harvesting and selling of virtual vegetables, fruits and flowers, we can find out ________ all the excitement is about.

No matter how much money you have，it   can not—— a wealthy body．

 — Any advice about this trip?— Well, no food is available on _____ island so make sure you bring _____ packed lunch and drink, as well as your camera and sunblock.