As a Chinese saying goes, a mountain ______ be too high or an ocean too deep. Therefore, there is no end to our self-improvement.
He asked me _____ finished my work.
He asked _____ for the computer.
The teacher told us that light _____ faster than sound.
Mr. Smith asked Nancy _____ it took her to fly to New York.
Mr. Green asked Lily whether she had passed the exam _____