问题
选择题
A few years ago, scientists in the Antarctic became aware of ________ in the ozone layer.[ ]
A. holes growing
B. holes to grow
C. holes' being grown
D. holes to be grown
答案
| A |
搜题请搜索小程序“爱下问搜题”
A few years ago, scientists in the Antarctic became aware of ________ in the ozone layer.[ ]
A. holes growing
B. holes to grow
C. holes' being grown
D. holes to be grown
| A |