There's no snake that will habitually（习惯性地）attack humans__________ it is in danger.
A.unless B.if C.though D.since
It's reported that Xiangshui explosion（爆炸）__________78 persons and the doctors are trying their best to save the wounded.
A.kills B.has killed C.killed D.had killed
—Who helped you with your poster，your father or your mother？
—__________. They were too busy，so I made it by myself.
A.None B.Neither C.Both D.Either
Few people believed Chinese fiction films would be popular. However，The Wandering Earth __________to be a big hit.
A.turns out B.puts out C.carries out D.breaks out
—Excuse me，how can I take the online course？
—Fill in the form first and we'll see __________we can do for you.
A.when B.what C.where D.how
Sometimes I feel stressed because what my parents want me to do has gone __________my power.
A.through B.against C.above D.beyond
