Question 23: Mark the letter A, B, C or D to indicate the correct answer to each of the following questions. Question 17. Glass containers can be used __________ storing food or other items.

Knowledge of prepositional phrases

We have : to be used for st/doing st: used for what

=> Glass containers can be used to store food or other things.

Other structures to note:

To be/get used +Ving: get used to something