______ 840 square miles, the national park has beautiful lakes, mountains and forests.
A. Cover B. Covering
C. Covered D. To cover
In addition to a healthy diet, you also need regular exercise _______ weight.
A.losing B.having lost C.lost D.to lose
The earthquake hit Central Mexico on Tuesday evening, ________31 people.
A.injuring B.injured C.having injured D.to injure
—Have you started writing your report?
—Not yet. I _______ a hard time getting the information.
A.am having B.had
C.was having D.will have
My grandpa has been enjoying good health ever since he _______ smoking.
A.stops B.stopped
C.has stopped D.had stopped
––Why are you buying a new refrigerator?
––The old one ______ so many times that it’s not worth it any more.
A.has repaired B.is repaired
C.has been repaired D.has been repairing
