The left-behind kids(留守儿童)can’t see their parents____ the parents come back home from work.
--_____?--For tow hours.
Nanjing is one of the in China.
The college entrance examination(the gaokao)is one of the most important exams.Families take it_____.
Cindy is always helpul. She only thinks of others and does not_____herself.
I expected Mark_____his tanlents in the competition,but he did not appear.