---I think you’d better type this letter again before Mr. Smith sees it.
--- Oh, dear!
| A．Who cares? | B．No bother. | C．I don’t mind at all | D．Is it as bad as that? |
As we all know, it was _____ that resulted in the terrible car accident.
| A．because of her carelessness | B．her being careless |
| C．because she was careless | D．she was so careless |
In order not to be disturbed ,I spent three days __________ in my study.
| A．locking | B．locked | C．to lock | D．lock |
With online course Crazy English has over 20 million students all over China _______ the class through the Internet .
| A．attend | B．attended | C．attending | D．to be attending |
He sat back on the chair, took a book and began to read, ___.
| A．being looked at ease | B．looked rather at ease |
| C．to look rather at ease | D．looking rather at ease |
At the computer operation test, one is supposed to stay at his own machine, keep his eyes on his screen, ______ to anyone.
| A．and not to speak | B．but could not speak |
| C．instead of speaking | D．or rather speak |