9.

Answer and Explanation

Your Answer is

Correct Answer is C

Explanation

which guides the non-restrictive attributive clause, modifies the gather around a carpet, which is the object of do in the clause, C is correct.

A item: in which needs to be an adverbial in the clause, and the adverbial clause of the clause cannot be in the carpet referred to by in which, so it is wrong.

Item B: There is no such expression in being.

Item D: Make two complete sentences without conjunctions before and after the underlined part, which is wrong.