There is/are - Countable/Uncountable

(stapler)

_____ on the desk.

(staple)

_____ on the desk.

(pen)

_____ on the notebook.

(pen)

_____ on the notebook.

(key)

_____ in the lock.

(key)

_____ in her hand.

(glue)

_____ on the table.

(water)

_____ on the keyboard.

(glitter - ラメ)

_____ in the jar.

(mug)

_____ on the shelves.