I like watching dolphins_____A.to junmp up and down B.jump un and downC.junmps up and downD.jumped up and down选择并说明为什么?

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I like watching dolphins_____A.to junmp up and down B.jump un and downC.junmps up and downD.jumped up and down选择并说明为什么?

I like watching dolphins_____A.to junmp up and down B.jump un and downC.junmps up and downD.jumped up and down选择并说明为什么?
I like watching dolphins_____
A.to junmp up and down
B.jump un and down
C.junmps up and down
D.jumped up and down
选择并说明为什么?

I like watching dolphins_____A.to junmp up and down B.jump un and downC.junmps up and downD.jumped up and down选择并说明为什么?
答案选B
watch sb. (do) 注视着某人做某事(指看某人做事的全过程)
类似的还有:
see sb. (do) 看着某人做某事
hear sb. (do) 听着某人做某事

A
to jump和jumping都对