The state-runcompany is required to make its accounts as_________ as possiblefor its staff to monitor the use of money

The window is dirty—-I know It ______ for weeks

A Wechat(微信) is an invention ______ can help people talk to friends , share photos, ideas and feelings freely.

2. It is well known that China’s great achievements in economic and social development over the past 30 years cannot be _____ its continuous efforts to push for rural reforms.

He was seen____________ the garden just now.