. Nobody believed his reason for being absent from the class ______ he had to meet his uncle at the airport.
John decided that he had to do something to _______ his anger .
If we keep wasting so much energy, _____are that our oil wells will dry up and the environment will be destroyed.
— Where is my English book?— I brought it to you _____you were in hospital yesterday afternoon.
The nutrients in _____falls into the ocean quickly become available to other living creatures.
Don’t forget where the emergency exits are _____an emergency.