It is widely accepted that animals learn to do things because their certain acts lead to _______.
-- I am strongly against the plan. -- No matter what you think of, I’m_______it.
An American scientist and writer _______ coming to give us a lecture on English learning methods when he visits our school.
All possible means _______to rescue the miners trapped underground so far.
– She is a little selfish. _______, she only cares about herself. -- No wonder she is so unpopular.
_______ their service, the workers of the hotel are active in learning English.