英语 You must ---carefully during the experiment.A watch B see

问题描述:

英语 You must ---carefully during the experiment.A watch B see
请说明理由

A
watch 指用眼睛跟随某物,以便对每一个变化、运动等进行观察,
而see是强调动作的结果“看见,看到”,这和观看实验进程这个语境不符