In this four-person game, the one who finds ______ hidden balls will win the last free ticket for the concert.

There is a real possibility that these animals could be frightened，__________a sudden loud noise.

Do you feel like ______ out– No, I’d rather we _______ a taxi.

The thieves ran away when the burglar alarm(防盗警报器).

Mary, ______ girl, wants to be a doctor.