The correct answers are: 1)4 Mom doesn't know is the subject or main clause, in the kitchen isn't a clause as it lacks a verb and a subject, the 4rth choice is the most complete one. 2)1 It can't be the object since "That she read the assignment" is the "subject" of the verb itself, but it isn't the proper subject because the true subject is "Kam's choice"; it is an appositive clause related to the subject. 3)A the verb is a nominal predicative, thus technically it would be a direct object, but most grammar quizzes or books won't consider it as such. The most correct answer would therefore be A, because reversing the sentence this role would be possible.
