Everyone ______ to pick up litter on the ground.A. is supposedB. supposesC. are supposed
---What’s your ________? --- It’s 13958176532.
---How are you? -- I ________ fine.
---What’s this? ---It’s ________.
“ 千克” 的缩写形式是________.
下列字母的发音中含有元音音素的是________.