题目内容：

    On Tuesday, China announced it had grown the first ever plants on the moon, days after landing on the moon’s “far side” Von Karman crater. The cotton seed sprouts (新芽) seemed to have withstood the tough lunar conditions: freezing temperatures, lower gravity levels, and radiation.

But by Thursday, the new cotton seed sprouts had dead already, according to Liu Hanlong, the experiment leader, in a government press conference statement.

After Chang’e-4 landed on the far side of the moon earlier this month, the probe (探测器) was sent a command to remotely water the plants and start the growing process. A tube directed natural light on the surface of the moon into the small container to allow the plants to grow. The probe entered a sleep mode on Sunday, the first lunar night after the probe’s landing.

Professor Xie Gengxin, professor at Chongqing University and chief designer of the experiment, told CNN that it ended after nine days when the control team shut down the power. Xie said temperatures inside the biosphere had grown too abnormal and reached extremes that would likely kill all life, including the seeds and eggs during the lunar night. Xie didn’t confirm why temperatures had risen to levels unbearable for the plants in spite of the measures taken by the research team.

Even though the experiment was quickly terminated, Xie considered it a success. The cotton were the only seeds to sprout, however, and despite many assumptions about the future possibility of moon clothes, the cotton plant’s main purpose this time was to give researchers the valuable data on how to cultivate life in the moon’s tough conditions. The eventual ability to grow plants on the moon could prove useful for long-term space missions, like a trip to Mars. Astronauts could theoretically harvest their own food in space, avoiding the need to return to Earth to resupply.

Aside from the apparent failure of the biological or plant experiment, the rest of China’s mission to the far side of the moon appeared on track as of Thursday. The historic mission is intended to accomplish a range of tasks, including conducting the first lunar low-frequency radio astronomy experiment and exploring whether there is water at the moon’s poles.

Chang’e-4 is the latest step in China’s robotic lunar-exploration program, named after a moon goddess in Chinese mythology. China plans to launch the Chang’e-5 sample-return mission sometime this year.

1.What does the underlined word “withstood” mean?

A.Appreciated. B.Suffered from.

C.Tolerated. D.Been subject to.

2.What is the fourth paragraph mainly about?

A.The measures of the research team. B.The cause of ceasing the experiment.

C.The reason for the extreme temperature. D.The failure and impact of the experiment.

3.What is the major target of the plant experiment?

A.To make moon clothes possible.

B.To ensure its value for long-term space missions.

C.To enable astronauts to harvest their own food without returning to Earth to resupply.

D.To accumulate the priceless data on how to grow life in the moon’s severe conditions.

4.What is the best title for the text?

A.China’s moon plants have died

B.China’s mission to the far side of the moon

C.The Chang’e-5 sample-return mission

D.Astronauts’ efforts to cultivate life in the moon