the

         a certain doubt among the people as to the practical value of the project

It is impossible for us to hear everything ____ is going on in the world

The little girl who got lost decided to remain _________she was and wait tor her mother.

Since China has entered the WTO, the ______ on foreign businesses will gradually be reduced.

The noise kept him __________.

He is responsible ___ the traffic accident.

Who should be responsible ___ the staff’s absenteeism?

Don’t forget____ the door before you leave

The heavy rain stopped us _______ at the station on time

The thief admitted _______ gold rings in the store