Once ___ light, the film will be damaged and get useless.
| A．exposed to |
| B．exposed in |
| C．exposing in |
| D．expose under |
It ________ Bob drives badly.
| A．thinks that | B．is thought what | C．thought that | D．is thought that |
Is this ________ we met each other two years ago
| A．place | B．place in which | C．where | D．place which |
"Do you know ________ " "His father is a doctor."
| A．what is his father | B．who is his father |
| C．what his father is | D．who his father is |
I have no idea ________ or not he has finished the work.
| A．if | B．that | C．whether | D．which |
One of the men held the view ________ the book said was right.
| A．what that | B．that what | C．that which | D．which that |