As you know, our planet, with its atmosphere and everything on it, is constantly________________.
举一反三
- ___from space, our earth ,with water covering over 70% of its surface, appears as a “blue planet”
- It is vital that you ___our competitors to know our plan.
- Do you know the name of our school?
- Marketers seem to know everything about you, from your habits to your preferences. They reach you ________, _________ and ________.
- You cannot __________ to learn everything you need to know about automobile manufacturing from a teacher in a classroom.