________caused the accident is still a complete mystery.
| A．What | B．That | C．How | D．Where |
He has donated some money to those who________ in poverty, which of great help.
| A．live, is | B．lives, are | C．live, are | D．lives, is |
–________ the ticket for the movie?
--Yes. I bought it online by group buying.
| A．Had you got | B．Will you get | C．Do you get | D．Have you got |
Actually you can make learning English a process, ________ you can not only learn much knowledge but also interesting cultures.
| A．which | B．where | C．when | D．what |
The Winter Olympic Games ________ in Sochi, Russia in February, 2014 was also a great party for athletes from different countries.
| A．was held | B．being held | C．to be held | D．held |
—Sorry, Madam. Any problem?
— Yes. The fish is served undercooked and with nothing .
| A．to add | B．adding | C．added | D．adds |