定语从句a)he has three sisters,none of _____is a doctors.b)he ha
定语从句
a)he has three sisters,none of _____is a doctors.
b)he has three isiters,______are doctors.
c)he has three sisters,but none of_____is a doctor.
d)he has three sisters;_____are doctors.
a,whom b,them c,they d,who
答案为babc,求各题解析,