Question

Fill in the blank with the most appropriate word from those given in the brackets:
I think the guide .................... take us around the old monument. (can, should, may, might, must, could)

Answer 1

The main use of should now is to tell somebody what they ought to do, to give advice, or to add emphasis, like the guide's obligation to take the speaker(s) around the old monument. Hence, "should" is the most appropriate word.