Three people got killed by two explosions—When was __________—________ was on April 15 __________ the 2013 BostonMarathon was being held

The blue coat is the cheapest and the red coat is the second _________

wyers have donated $ 50, 000 to _________ ourschool’s campaign “Help the Needy”, which was started by our former headmaster10 years ago.

下列各句中，没有语病的一项是（ ）

After half a day’s hard work, we made our classroom look as _______ as new.