--_______ which direction are you going, north or south?
--I’m heading north.
| A．To | B．For | C．In | D．At |
Microblog is a platform ________ people can express their thoughts and communicate with each other by sending posts.
| A．which | B．where | C．what | D．when |
It was not until 1938 _________ the first colour TV programme was broadcast.
| A．which | B．that | C．when | D．on which |
Mr. John was so humorous that we had a good laugh ______ the meal.
| A．at | B．over | C．in | D．between |
I don’t think it easy, even if we work hard, ______ the South Korea and the North Korea to sit down to talk at present.
| A．persuaded | B．to persuade | C．persuade | D．persuading |
No student ______ go out of the school campus after 10:00 at night without permission according to the school regulations.
| A．shall | B．must | C．would | D．should |