Question

in order to use a pipet, place a choose... at the top of the pipet. use this object to fill the pipet such that the choose... of the liquid is even with the volchoose... the liquid, touching the tip of the pipet to the side of the container if necessary to release the last drop choose... bulb or pump syringe

Explanation:

To use a pipet, a bulb or pump (like a pipet bulb or a pump device) is placed at the top of the pipet to help draw and control the liquid. A syringe is not the typical tool used for standard pipet operation in most basic lab settings for this purpose. So the correct choice for the first "Choose..." (the object at the top of the pipet) is "bulb or pump".

Answer:

bulb or pump