一位男老师正在教一位学生打篮球,话题中谈到学生妈妈。
A:What is your mother's (46) (47) ?
B: (48) favorite (49)is playing basketball.
A:Why (50) she like playing basketball?
B:Because (51) very interesting.
A:Who is (52) basketball (53) ?
B: (54) basketball teacher (55) Mr Smith.
46.______