w couple couldn’t afford a new house _______, theybought a second-hand one

How ____you are coughing! —–Yes, I have had a ________cough since last week.

The U Sdeclares ithas the best medical technology in the world，but quite alot of Americans have no __________to health care service

No worker and no engineer whoit is that is forthe explosion of the chemical factory

The number of people invited ______ fifty, but a number of them ________ absent for different reasons.