According to its website, each tattoo lasts around seven days, ________ it isn't scrubbed or picked at.
| A．having provided | B．provided that |
| C．providing that | D．being provided |
I fixed my eyes upon the newcomer, wondering whether I ________ him somewhere before．
| A．saw | B．has seen | C．had seen | D．would see |
一I’m sorry! I would have taken him to hospital if I had known he was seriously ill.
一But ______ .
| A．you didn’t | B．you hadn’t | C．he wasn’t | D．you aren’t |
The question that puzzled them is ____ they can get rid of the air pollution in the area.
| A．how is it that | B．that how | C．that it is how | D．how it is that |
It is reported that many a new house ____ at present in the disaster area in Gansu Province.
| A．was being built | B．were being built | C．is being built | D．are being built |
_____ on a clear day, far from the city crowds, the mountains gave him a sense of peace.
| A．If walking | B．While walking | C．Walking | D．When he was walking |