【单选题】What is wind? You can feel it, and you can sometimes hear it, too. You can't see the wind, but you can see all kinds of plants and flowers moving in the wind. Grass moves in the wind. So do trees. Wha...
【简答题】A.It can make you feel uncomfortable. B.It can make you out of breath. C.It can cause back pains. D.It can damage muscles that aren't used to working.
【单选题】Only by following the proper steps closely ______confident that you haven’t missed anything. A) you feel B) you will feel C) can you feel D) you can feel