If only I _____ my watch!
After school we went to the reading-room to do some reading, only to be told that it _____.
Jack is a great talker. It’s high time that he ____something instead of just talking.
Clothing made of man-made fibers has certain advantages over _____ made of natural fibers like cotton, wool or silk.
At the meeting they discussed three different ____ to the study of English grammar.
He pretended _____ an important paper when the boss entered.