1.The World Wide Web is sometimes jokingil called the World

1.The World Wide Web is sometimes jokingil called the World Wide Wait because it _______be very slow.
A.should B.must C.will D.can
应该选择B?从must 100%可能看.但从because看好像can也可以?
2.Do you think I could borrow your bicycle --_________.
A.How come?B.Take your time .
C.Yes,go on.D.Yes,help youself.
B .D .A肯定错,那C怎么翻译?你认为我能向你借自行车吗?是的,继续?
3.______more about univercity courses ,call this number.
A.To find out B Finding out
选A应该.因为是去找.而B应该表示一个动作.有没有说得更加确切详细的?