They ... (listen) this music two hours ago

(a)  

My mother ... (is) a nurse

(a)  

I ... (see) Sue in the bookstore yesterday

(a)  

(Do) ... they play football two hours ago?

(a)  

(-) My mom did not bake a cake two days ago

(?) ...

(a)  

(+) (a)  

(-) The students did not study English yesterday

(-) ...

(?) Was Intan happy?

(a)  

(+) ...

(-) She did not meet her mother last night

(a)  

(+) (a)  

(?) Did she work in the office last night