IF TOO MANY SPECIES ________, IT WILL VERY MUCH UPSET THE ECOSYSTE...

Question

19. If too many species ________, it will very much upset the ecosystem.  A. extinct  B. go out  C. run out  D. die out

Answer

19. If too many species ________, it will very much upset the ecosystem.  A. extinct  B. go out  C. run out  D. die out