A driver should ________ the road when _________.
| A．concentrate on; drive | B．concentrate in; driving |
| C．concentrate to; drove | D．concentrate on; driving |
What he said was of ________.
| A．great importance | B．important | C．great important | D．importantly |
_________, the subject belongs to biology.
| A．Strictly spoken | B．Spoken strictly | C．Strictly speaking | D．Speaking strictly |
_____seems _______something unusual in his eyes.
| A．It; being | B．It; to be | C．There ;to be | D．There; being |
When I come in, I found a strange girl ______in the corner.
| A．seating | B．seated | C．to be seating | D．seat |