climb the tree! It’s too small. Come down quickly!
The World Health Organization has given some advice on________to protect us from being infected(感染)with H7N9.
—What do you usually help your mother________?—I often do the dishes.
--How clean the window is!--Yes. It ________ just now.
--Where is Jim?--He ________ Chengdu.
--What’s your ________?--I like collecting stamps.