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Assessing otters' environmental requirements is surprisingly (i)___________. One reason for this has to do with establishing how much they use different areas. Doing so may be (ii)____________ in some kinds of terrain,such as Shetland, where the Eurasian otters are active in daytime and have clear individual markings. There it is possible to recognize individuals over stretches of coast of a few kilometers and to see what kinds of coast they use. However, those kinds of field conditions are (iii)____________.
- Blank(i)
- straightforward
- controversial
- difficult
- Blank(ii)
- quite problematic
- relatively simple
- largely unnecessary
- Blank(iii)
- routine
- deceptive
- exceptional
difficult , relatively simple , exceptional 显示答案
以上解析由 考满分老师提供。
