The boy __________ his friends was playing in the street when the earthquake happened.[ ]

Why are you in such a hurry,Li Ping ? —-There____a basketball match between Class One and our class in five minutes.

Our school is going to hold the ________ Culture Festival. —Yes! And we can take part in ________ activities.

There is no doubt _______international cooperation is the key to dealing with cyber crime.

_________all of them are strong candidates, only one will be chosen for the post.