Complete the sentences with can or could (some sentences are in negative or interrogative). 5.a She ______________ take the stress of the exams. She now has to retake them. 5.b) ______________ I stay at my friend's house tonight? 5.c) My friends ______________ talk for hours about the most different topics. 5.d) ______________ you help me move this TV, please? I'm going to give it to my cousin.