—Is this pen? --Yes, it is. It’s orange pen.
-- Mom, when shall we go to Weifang Museum this weekend? -- Oh, sorry. I'm going to Beijing for a meeting. ___Saturday __ Sunday is OK.
Girl students in some schools are not allowed______ long hair.
No one can be successful ______ hard work.
---What color are your sports shoes? --- __________ are dark blue.
---Do you have _________ e-mail address? ---Sorry, I don’t have one.