题目内容：

LOS ANGELES,July8（Xinhua）——Michael Jackson's burial remained a mystery as part of his brain is being held by the coroner's （验尸官）office for tests, an official said.

The late superstar's body was transported to an undisclosed place Tuesday after a star-crowded public memorial service at the Staples Center in downtown Los Angeles. It is still unclear where and when the singer's body will be buried.

Ed Winter, assistant chief coroner said families often wait for mass of brain part to be returned before permitted burial. He said he understood no burial would take place immediately although he was not aware of instructions from the Jackson family. The coroner's office released a death certificate(证明) for Jackson Tuesday that listed the cause of death as "delay."

Michael Jackson，the King of Pop，was born on August 29，1958，and died on June 25，2009 after being rushed to a Los Angeles hospital from his rented house when his heart stopped functioning properly. A police investigation into his death is focusing on the possibility that his death was caused by a medication overdose（过量）, including possibly Diprivan, a powerful sedative (镇静剂)usually used for general anesthesia（麻醉）.

68. Why hasn’t Jackson’s burial been held? ______

A. The place to bury him isn’t sure.

B. His family didn’t give instructions

C. Part of his body is still being tested

D. The time to bury him is still being  discusseded

69. The direct cause of the super popstar’s death is ______

A. that his heart stopped beating

B. due to a powerful sedative used for anesthesia

C. overdose of some medicine

D. the delay of being rushed to the hospital

70. Which statement is true? ______

A. No one can bury the body of one’s beloved without the government’s instructions.

B. Many popstars were involved in Jackson’s memorial service.

C. The police doubted whether Jackson was murdered.

D. Jackson died at home.

71. We can infer from the passage that______

A. The burial can’t happen without a death certificate.

B. Jackson’s family are skeptical (怀疑的)about Jackson’s death

C. Jackson was possibly murdered by his doctor

D. The brain part of all people’s body must be transported to be tested