The letters for the boss. __________ on his desk but he didn't read them until three days later.
In order to gain a bigger share in the international market, many state-run companies are striving _______ their products more competitive.
Fishing is his favorite hobby, and _______.
There are five pairs _______, but I’m at a loss which to choose.
—What do you think made Mary so upset? —_______ her new bike.
When I handed the report to John, he said that George was the person _______.