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Find the mistake
1- It's coffee that stops me asleep, that's why I often stay up late.
2- Water in the river is very clean.
3- Where is the pen I have just put it on the table.
We got hot springs when water comes through a pipe in the earth's surface.

It's the coffee that stops me asleep, that's why I often stay up late.
2- the Water in the river is very clean.
.

where is the pen i have just put on the table.
هنا ضمير وصل محذوف بعد pen و هو which