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allthestudentmustfollowtheirteacher's()whiletheyaredoingthisexperimentA.instructionsB.instructionC.aninstructionD.theinstructions
题目内容：
all the student must follow their teacher's ( )while they are doing this experiment
A.instructions B.instruction C.an instruction D.the instructions优质解答
A
没啥好解释,instructions 是指示,加个s是固定的
A.instructions B.instruction C.an instruction D.the instructions
优质解答
没啥好解释,instructions 是指示,加个s是固定的
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