Lili ________ be at home. She has gone to the farm to pick apples.
mustn’t
can’t
must
can
–Did you buy _______ for yourself? --No, I bought ________.
Helen was so careless that she made _______ mistakes in her math exam.
-- ________ do you hear from Karen this year? --Hardly ever.
Tina’s cousin is _______ violinist. He can play _______ violin very well.
— I plan to be the top student in our school this term. — .