I'm sure grandpa will be very happy ____(see) us

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I'msuregrandpawillbeveryhappy____(see)usI'msuregrandpawillbeveryhappy____(see)usI'msureg

I'm sure grandpa will be very happy ____(see) us
I'm sure grandpa will be very happy ____(see) us

I'm sure grandpa will be very happy ____(see) us
填 to see
固定结构：be happy to do sth 做某事很开心
我确信爷爷看见我吗一定会很开心的.