_______was often the case, Miss Wang was the first to arrive at the school in the morning .
| A．Which | B．What | C．As | D．It |
— Why are you still here? Everybody has gone to attend the lecture by the president.
— Oh, I__________about it!
| A．wasn’t informed | B．hadn’t been informed | C．haven’t informed | D．didn’t inform |
Mr. Duncan raised an unnecessary question he then failed to find an answer.
| A．to which | B．for which | C．with which | D．by which |
____________caused the accident is still a mystery.
| A．How | B．What | C．That | D．Where |
__from Adelaide to Darwin and you’ll observe some of Australia’s most beautiful landscapes.
| A．Traveling | B．To travel | C．Traveled | D．Travel |
It is in the year of 2010 a severe drought hits Yunnan province.
| A．until | B．that | C．before | D．when |