Everything is full of yellow dust because of the sandstorm（沙尘暴）.     ！

—Look at the children in the lake. They are playing happily Let’s _____,too.—Good idea!

—I’m leaving now.—______ you turn off the lights and the computer.

______ the pieces of cloth with a loose stitch before finally sewing them together. 

______ for the boy to talk with his mouth full!