Do you know what speed _______ for a rocket to escape from the pull or gravity of the earth to send a satellite into outer space? -No idea at all. I have never got the ______ of it.[ ]

They will telephone the police and complain about it thenoise.

,Jenny!—Hello,Alice!

Must I turn off the gas after cooking? —Of course, you can never be ____careful with that

.—_____ I watch TV, I’ll turn it down and never make any noise.　 — Good. ______ you are doing should never disturb others. _______ how important you are,never forget about how others feel.