They’ll get home _____ two hours.

With an online course Lynn has over 300, 000 studentsall over China ____ her class through the Internet.

His parents are strict him.

You should be________ of your________ behaviour.[ ]

Lu Jialei ， 14， from Hangzhou Foreign Language School ， won first place in the CCTV Chinese Character Spelling Contest (汉字听写大会).