用括号内所给词的正确形式填空.16.I think it is important for u

用括号内所给词的正确形式填空.16.I think it is important for u
用括号内所给词的正确形式填空.
16.I think it is important for us _______ (keep) in good health.
17.We go swimming (two) a week.18.I work as (hard) as my sister.
19 Who is (tall),Wang Lin or Lin Tao?20 .My coat is different from (her).