In asports team each player has a clear role，and there are few _______when members areuncertain of their roles

Hurry, Mike! The bus is coming. —Wait a moment, please! Let me see ifthere’s __________ left.

for a second,” the boy says, “______ thatmy father would come to my rescue”

Her book didn’t _______children probably because she employed too many scientific terms.

it is 30 years______ we last met, I stillremember the scene ______ we got separated on a rainy day.