When asked why he prefers bikes to buses, the professor said,  “Riding a bicycle takes __________ half an hour, but it’s more convenient and environmentally friendly. ”

—You don’t seem to be quite yourself today,Jim?—I’m suffering from a cold.Nothing serious,__________.

--- The earthquake last night was really terrible. --- ______, no people were injured or killed, and they escaped in time.

We’ve published large quantities of books. This year______ we’ve published three million copies.

His report was so exciting that it was      interrupted by applause（掌声）.