The house caught___fire last night but no one knows who set ___fire to it.
A. X；X B.X;a C, a; a D, a; X
I was just coming along to see you ___ I ran into Mr Wilson.
| A．as | B．while | C．then | D．when |
Let’s walk over ___ the sun on the other side of the street.
| A．in | B．to | C．under | D．by |
Mr. Hunter is quite popular ___ his students.
| A．about | B．for | C．in | D．with |
Ms Wright complained that her husband never asked about the price ___ he decided to buy musical disks.
| A．while | B．before | C．after | D．as soon as |
Mary came late not ___ the heavy rain, but ___ she was ill.
| A．because, because | B．because, because of | C．because of, because | D．because of, because of |