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!

How do your daughters like your presents for Christmas一 Linda Kate likes them. They both say the presents are wonderful.

The conductor blew his whistle and the train slowly ________.[ ]

Information has been put forward _____more middle school graduates will be admitted into universities. [ ]

Many websites have been _______ to help people study foreign languages.