4. Many elderly people have shorter sleep at night, and would wake up before _____.
(A) dusk
(B) doubt
(C) dawn
(D) dirt
答案:登入後查看
統計: A(39), B(22), C(295), D(22), E(0) #3228988
統計: A(39), B(22), C(295), D(22), E(0) #3228988