With his attention________on the shops along the roadside，he knocked an old man down while riding to school.
A concentrating B．concentrated C．to concentrate D．concentrates
答案 B
解析 考查词组，故选B项。
There are two caps on the table, _____ belongs to Tom.
| A．the smaller of which | B．the small of that |
| C．the smaller of them | D．the small one |
The temple , _______ the Song Dynasty ,was pulled down last month.
| A．which dating from | B．which was dated from | C．dated from | D．dating from |
Weather in these years is not similar to ____in the past .
| A．it | B．that | C．one | D．those |
This is one of the best films ___________ .
| A．that have been shown this year | B．that have shown |
| C．that has been shown this year | D．that you talked |
The reason _____he refused to attend the meeting was that they didn’t give him an invitation earlier.
| A．how | B．which | C．why | D．because |