_________ smoking, he would not have got cancer in the lung.

At the age of 29, Dave was a worker, _______ in a small apartment near Boston and ______ what to do about his future.

After meeting the beautiful girl, Peter lay on his bed with wonderful ideas ________ in.     

—Can those _____ at the back of the classroom hear me?—No problem.

He stopped _______christmas cards a few yesrs ago,so he received almost none.