theyheardthenoiseoftraffic(thenextmorning)对括号部分提问snowballshitbeijing(three)timeslastyear.theboystudiesveryhard(becausehewantstobeatopstudentinhisclass)

Question

they heard the noise of traffic (the next morning)对括号部分提问
snowballs hit beijing (three) times last year.
the boy studies very hard (because he wants to be a top student in his class)

Answer 1

When did they hear the noise of traffic?
How many times did snowballs hit beijing last year?
Why does the boy study very hard?