A:增温增湿
B:降温减湿
C:形成大渔场
D:防止污染物扩散
在《比一比》文中找出两对反义词。
____——____ ____——____
— Bob, shall we go and meet our new classmate?
— Sorry, I'm busy now. But you ________ ask David to go with you. He is free.
Early this morning I was busy ____ (挖) in the garden to plant trees.