The teacher talked in a very low voice_____make himself________, clearly.

It ____in this new hall ____ was just set up last month ________ we held an important meeting yesterday.

—Mom, can I go out and play with my friends now?—No, honey, you can’t _____ you haven’t recovered from the knee injury.

It may not rain, but you had better take an umbrella__________.

Many of them turned a deaf ear to his advice，________ they knew it to be valuable.