_____ environmental damage is done, it takes many years for the ecosystem (生态系统)
题型：江苏高考真题难度：来源：
| _____ environmental damage is done, it takes many years for the ecosystem (生态系统) to recover. |
A. Even if
B. If only
C. While
D. Once |
答案
举一反三
| Several weeks had gone by ______ I realized the painting was missing. |
A. as
B. before
C. since
D. when |
| It was evening _____ we reached the little town of Winchester. |
A. that
B. until
C. since
D. before |
| _____ you call me to say you"re not coming, I"ll see you at the theatre. |
A. Though
B. Whether
C. Until
D. Unless |
| It was some time ______ we realized the truth. |
A. when
B. until
C. since
D. before |
| ______ you"ve tried it, you can"t imagine how pleasant it is. |
A. Unless
B. Because
C. Although
D. When |
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