--Excuse me, I don't think you can smoke here.
---Really sorry. I ______ this is a non-smoking room.
| A．didn't know | B．don't know | C．have no idea | D．haven't known |
____ at a college or university in the USA, Chinese and other international students must demonstrate a strong ability in spoken and written English.
| A．Having been accepted | B．To be accepted | C．Being accepted | D．Accepted |
With a lot of difficult problems ____, the manager felt worried all the time.
| A．settled | B．to be settled | C．settling | D．to settle |
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 |
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 |
The bank is reported in the local newspaper in broad daylight yesterday.
| A．being robbed | B．to have been robbed |
| C．robbed | D．having been robbed |