________ the working efficiency, the boss allows the employees to have a coffee break. [ ]

This book _____ ten units, ______ three mainly revision.

The reporter has written ________ articles about air pollution hoping to call the attention of all people to the problem.[ ]

Finally, she ______ to push the heavy driver’s door open enough so that the lights turned on.

s trying to make a final statement,but people kept ______ her speechby shouting.