The boss made the workers ________ten hours a day.
Not everyone knew about the Hong Kong singer Deng Ziqi, some even thought she was nobody, but she____________ to be a great singer and won a lot of fans.
I listened to Professor Chen-Ning Franklin Yang’s lecture about his study and physics, but I failed to get its key ______ .
--Excuse me, teacher, can I ask you something about the last class? I didn’t quite understand it.--Sure! Please feel _________to ask me anything!
--Excuse me, can I have this seat, please?--I’m sorry, but it’s_______.
—You see, China is becoming stronger and stronger now.—Yes. That’s why Chinese _____ in more and more schools out of our country.