... __SERIOUSLY____ damaged natural habitats. 4. A number of wildlife habitat reserves have been (establish) ___ESTABLISHED__ to save endangered < /b> species.< /b> 5. Weeds can be (benefit) __BENIFICIAL___ in some cases: ... their conservation work. d. a & b 4 5 KEY - < /b> Unit < /b> 10: < /b> ENDANGERED < /b> SPECIES < /b> (12CB & NC) I. Tenses 1. A: How (you, break) __DID YOU BREAK___ your arm? B: I (slip) __SLIPPED______on the ice while ... _____________________ damaged natural habitats. 4. A number of wildlife habitat reserves have been (establish) ___________________ to save endangered < /b> species.< /b> 5. Weeds can be (benefit) _________________ in...