请帮我填空：The boat __________ midle of the river.

The boat is in the middle of the river.
小船在河的中央.
in the middle of ...在...的中部,中央
这里还需要添上be动词,由于boat 是单数,所以用is

is in the

is是动词,middle的固定搭配介词为in

The boat __stop in the____ midle of the river.

is being in the