Mary’s got crazy and has been sent to the mental hospital. Did you tell her boss about that?— Yes, but I _____ her husband first.

Rainforests _____ and burned at such a speed that they will disappear from the earth in the future.[ ]

I_________that he is an excellent leader,I don’tthink he can do a good job in this company because he is too careless

Do you know the reason _________ pilotsturn off the plane’s lights before taking off —The practice is for the passengers toadjust to the dark _________ an emergency.

_____ the steep mountains，he had no difficulty reaching the top.