He is quite strange, for everything he does is opposite to ______ is considered normal behavior

Could you say something about Turkey’s downing of the Russian fighter jet—Sorry. It ______ by a group of experts and will be made clear the moment they get the answer.

use your cellphone — we are flying at ____altitude of 10,000 meters and ____average speech is 678km/h.

Jane is busy sharing her cell phone ________ she can get more red envelopes.

People ____ more and more useful things to protect the earth since Earth Day was started.