45. My sister is ____________ ________(擅长于) singing.
44. They ___________ ______________(去游泳)last Sunday.
43. I am ___________ ____________(寻找) some water.
42. How often do you eat fish ? About________(两次)a week.
41. She usually ______________(乘) a subway to work.
40. Give me a _____________(对)of socks.
39. What did you buy yesterday? I ____________(买)a pen.
38. She has a bag of _______________(薯条).
37. Jim ________________(居住)in Beijing.
36.I am going to ______________ (寄)a letter to my friend.