18. This book (send) ___________ to me several years ago by my bestfriend is my favourite book.
查看答案
19. Customers can refuse (accept) _________ the goods where it has adoubt about their origin.
20. The bright and (comfort) ___________room has a large living room withseparated sleeping area, kitchen and bathroom.
发现相对论的人是爱因斯坦。()
A. 对
B. 错
微信支付 
支付宝支付