Question

There ought to be a good opening in the shoe line(Use Adverbial clause)

Answer 1

Adverbial clause is a clause which acts like an adverb in the sentence. It describes the verb of the sentence.

Answer:
Where there is a shoe line, there ought to be a good opening.

The adverbial clause used here is $\underline\bold{Where\: there\:is\:a\:shoe\:line}$