19. We often find regions that are extremely well endowed ___ living things, even in high latitudes, and often in areas where common sense suggests that life might be most difficult.
举一反三
- There are so many things we often ______ remember in this go-go world we are living in… but your business cards ______ ALWAYS be with you. A: can, could B: may, would C: have to, should D: ought to, might
- Differences of opinion are often the most difficult problem to _____.
- ________ students often find it difficult to live in China at first.
- Things are often not as bad as we imagined.
- Some people ,______ hard they work, find it difficult to function well outside the areas that they know.