When do you think the conversation _____________?
---What do you think of the twin sisters? ---They are quite different. One is outgoing, __________ is very serious.
The old man __________ eats junk food, does he?
-- 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.