We should leave early tomorrow morning， _____ we won’t get there on time.

I saw Mr.Smith in the office at ten yesterday morning.—That’s impossible. He an Enghish party with us then.

Many a woman______ important positions in society, which________impossible in the past．

She ________ into the thick forest alone on such a dark night.

How could you _____ your friend so easily? — She is the kind of person who _____ in a crowd.