It has been confirmed____________he wasn’t the person who stole your bike.
| A．if | B．whether | C．why | D．that |
-----Where was it________the road accident happened yesterday?
-----In front of the market.
| A．when | B．that | C．in which | D．how |
All ________is needed for life on board the submarine comes from the ocean.
| A．/ | B．what | C．that | D．which |
Your pen________smoothly. Where did you buy it?
| A．writes | B．is written | C．wrote | D．was written |
All of people in the world should enjoy equal treatment, ________race, religion or sex.
| A．instead of | B．because of | C．regardless of | D．as a result of |
We forbid _____ in the reading room. That is, you are forbidden _____ in the reading room.
| A．to smoke; to smoke | B．to smoke; from smoking |
| C．smoking; smoking | D．smoking; to smoke |