Circle one mistake in each sentence

IV . Circle one mistake in each sentence 
1 . Hoang is much hard - working than Quang 
                 A    B                                C      D 
2. Students should"t to litter the schoolyard 
        A                            B       C      D 
3. There are any boys in my class 
                A           B           C     D
4.The students is having lunch at the school canteen   
                         A              B            C                    D 
5.Let"s going to the shopping center toomrrow 
               A      B           C                       D