Question

if only the water molecules can pass in/out of the cell, what will happen to this cell over time?
water will enter the cell
water will exit the cell

Explanation:

The movement of water in or out of the cell depends on the osmotic gradient. If the cell is in a hypotonic solution (lower solute concentration outside), water will enter the cell. If in a hypertonic solution (higher solute concentration outside), water will exit the cell. Since no information about the solute - concentration of the surrounding environment is given, both water - entering and water - exiting are possible scenarios depending on the osmotic conditions.

Answer:

Both water will enter the cell and water will exit the cell are possible depending on the osmotic environment of the cell.