Ten panda cubs（幼崽）born in 2020 made their debut（首次亮相）in Wenchuan County，Sichuan Province on Lichun，the beginning of Spring.
   At 11 a.m.，keepers took the 10 panda cubs to the Shenshuping Base of the China Conservation and Research Center for the Giant Panda.They played on a toy train there happily.
   "All of the 10 cubs were born in the center late last year.Among them，the oldest twin（雙胞胎）sisters are more than 190 days and the youngest is more than 120 days，" said Zhang Guiquan，a panda expert at the base.
   "In 1992，there were only 10 pandas here，but now it is home to 330.It is not easy to achieve such a great success，" Zhang explained.
   But they met many problems.At first，experts thought the pandas might like living alone，so they put them apart.But the pandas became upset and didn't eat food.Then experts realized they needed to communicate and play with each other.
   The abandonment of newborn（新生的）panda cubs was another common problem.Since 50 percent of the newborns are twins，the mother would choose to care for only one cub and leave behind the ojye.air.The base is trying to find ways to solve this problem.

（1）What were the pandas doing at 11 a.m.according to the passage？

B

B

A．Having lunch.
B．Playing.
C．Sleeping.
D．Doing sports.
（2）The underlined word "abandonment" in the last paragraph means "

C

C

" in English.
A．kindness
B．danger
C．giving up
D．growing up
（3）What can we know from the passage？

B

B

A．Experts realized that the pandas liked living together at first.
B．The number of pandas in the center has risen by about 300 since 1992.
C．The youngest cub in the center is more than 190 days old.
D．There is only one problem for experts to solve to help cubs grow better.
（4）Which can be the best title for the passage？

C

C

A．Problems of Ten Lovely Cubs
B．A Difficult Time for Cubs
C．The First Debut of Ten Cubs
D．Cubs Are Hard to Grow up