Must't V và us loại
=>We mustn't throw rubbish
thứ 4:we mustn't throw rubbish
Mark the letter A, B, C or D on your answer sheet to indicate the sentence that best fits the meaning of the given one: It is wrong of us to throw rubbish *
We must to throw rubbish
We mustn’t to throw rubbish
Us mustn’t throw rubbish
We mustn't throw rubbish