Question

if the glassware do not appear to be clean we ....... ask the waiter for replacement but we ......never clean them with our napkin.

options..
1.should,must. 2.may,shall. 3.should,may. 4.may,must​

Answer 1

Answer:

If the glassware do not appear to be clean we may ask the waiter for replacement but we shall never clean them with our napkin.

Explanation:

Option 2 is the answer