Smoking is so harmful to personal health that it kills ________ people each year than    automobile accidents.                                                         

Those young men were ________ by the police with making trouble in the neighbourhood.

To finish the task on time, I think we should _______ and cooperate.

You can take anything from the shelf and read, but please ______the books when you’ve finished with them.

 He pretended not to care but that remark     his real opinion on the matter.