Send for a doctor quickly. The old man is badly hurt so he needs _____ at once.

（ ） some mammals came to live in the sea is now known.

He （ ） yesterday morning, and would stay for three days.

（ ） when she started complaining.

He apologized _____ having to leave so early.

Only when （ ） in the afternoon （ ） able to leave.

Our daughter didn’t know what to （ ） when she first entered the university, as she hadn’t make up her mind about her future.

They spent all their money and made no （ ） for the future.

（ ） all her friends and money gone, Kate felt totally hopeless.

Nothing can _____ unless you tell us the truth.

Please let us have more time to play outside， _____?

Our teachers always tell us to believe in （ ） we do and who we are if we want to succeed.