13. It’s already 9 o’clock and Mother _____ step in any moment.

—Did you look up the time of trains to Shanghai?—Yes, the earliest train is  ________ to leave at 5:30 am.

She didn’t allow the accident to discourage her. On the contrary, she began to work        .

Oh, much smoke here! Somebody _______ the window, please.

The　　 question for them was to find out whether bees could tell each other the exact position of a feeding place.