—You seem to show interest in cooking.—What?_________, I’m getting tired of it.
Carbon dioxide, which makes a _____ between us and the sun, prevents heat from getting out of the atmosphere easily, so the earth is becoming warmer.
______ your brother or you to blame for the broken TV set?
A large quantity of information, as well as some timely help, ______ since the organization was built.
More than one high official ______ by the police since the mayor was shot dead.
John is the only one of the students in the class that never ______ a mistake even when it is pointed to him.