【2015·福建】It was________of Michael to inform us of his delay in case we got worried.
The employee you have been thinking highly of ____ reliable.
When he made a speech, the gathering ____ thunderous applause.
It’s the gases ___ natural gas and the burning of coal give off ____ add to the overheating of the earth.
The teacher doesn’t believe his reason for being absent from class ___ he was ill, ____mad him sad.
—— Bob has gone to California. —— Oh, can you tell me when he _____?