You are driving too fast. Can you drive_________?

The members of the board are discussing the problem right now; it will _____ have been solved by the end of next week．

Qingdao is ＿＿＿＿＿＿＿ beautiful city in summer. 

Interviews were carried out ________ over the telephone，via e－mail or fax or face to face in four cities including Beijing，Shanghai，Guangzhou and Wuhan.

Nelson Mandela, former president of South Africa, devoted himself        to making the black and white equal.