28. Be careful! The slightest spark(火花)could ______ the fireworks.
The audience were so ______ by his humorous performance that they kept laughing all the time.
When the market economy is introduced, many factories will not .
“___________ the election is over,” said Powell, “the time has come for me to step down as secretary of state and return to private life.”
—Having many helpers makes a task easier and faster to complete.—I think so. _______ .
The teacher suggested the dictionary at once.