Tom! Corey has broken the glass. — ______. Such things happen.

Only in this way____to make improvement(提高)in the operating system.[ ]

Why does Jane feel so upset—- She failed the exam and she has nofriends _________.

Kunar can take his car apart and put it back together again. I certainly wish he_____ me how.

Not having worked out the program, ________ leave the office