You had better_________because you have to drive back home.

people got hurt in the 7.1-magnitude earthquake in northwest China’s Qinghai Province.

Mum, have you seen my mobile phone?—The one you bought last week? I’m sorry I haven’t seen ________.

Mr. Wu, I can’t understand everything in class. —Don’t worry! I’ll _______ the main points at the end.

How do people usually ___________ in the office?