There is not many differences between the two. I really don’t know ___________.

Why were you late for school this morning–I got up very early this morning, ________ I didn’t catch the first bus.

_____ at the theatre，he found the ticket his friend gave him was left at home.[ ]

hysics problem is too difficultCan you show me __________, Wang Lin— Sure

________ watching a movie in an IMAX cinema costs over 100 yuan, the IMAX cinemas are always full of audience.