— I’m leaving for Shanghai to visit my grandparents this weekend. — _______ A. Well done! B. I hope so. C. Have a good trip!
---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因素的是________.
下列字母中不是元音字母的是________.