Linda _____ got a sister, but she's got a brother. [ ]
A. is
B. isn't
C. has
D. hasn't
答案:D
Han Han is a popular writer. His new book will _______ this September.[ ]
A. come up
B. come in
C. come out
D. come on
什么是ADSL?什么是FTTH?两者之间的主要区别是什么?