Nowadays people take___ exercise a day as they did in the past because of widely used automobiles.
Lisa wrote a letter in the morning, but Bob _______.
He fell asleep with a book ___________ open on his knees.
Nobody helps Mary _____ Lynn. [ ]
Dad, science is too hard for me.—Oh, dear, if you keep listening ________ in class and do enough exercises, you’ll find it easy.