Linda gave us a vivid _____ of her trip to Mount Lu after her return.

 It is high time that we started to consider what ________  we should take to reduce heavy smog caused by traffic fumes and other pollutions.

In my brother's absence, I would like to thank all concerned on his ________.

When chatting with her on the mobile phone, the battery _     dead suddenly.

You’d better ______your scores and see if you have passed the exam .