People around the world are becoming more and more _____ about the population explosion.

Which hotel are you in—I ______ in a hotel. A friend I meton the train from the south_____ to put me up for a couple of nights.

How can we deal with these old clothes —We can _____ to charity.

joy, Della first earned the trust of herstudents and then _____ of her colleagues.

ering your salary, you should ________ at least 100 dollars a week.