Respuesta :
After they cleaned their rooms, the boys planned to go swimming, but it started to rain.
1. The correct answer is C, After they cleaned their rooms, the boys planned to go swimming, but it started to rain. Because a compound-complex sentence contains two independent clauses and at least one dependent.
2.C is the correct answer, 'while I was reading last night' is the dependent clause.
2.C is the correct answer, 'while I was reading last night' is the dependent clause.