Whose tennis balls are these?Are they Linda's?
No,they be hers.She doesn't like playing tennis.( )
must
could
might
can't
--________ does your father visit your grandparents a week? –Once.
-- ______ you______ your homework yet? --Yes, I _____ it just now.
--_____ you ever ____ to Beijing? -- Yes, I went there last year.
---Isn’t the trip boring? --- . I’d like to sleep at home instead of going out.
-____you ever ____with a group? -Yes, I have .