All you have to do ___ to protect environment.
A: have to
B: are
C: is
D: to
A: have to
B: are
C: is
D: to
举一反三
- We have a moral _______________ to protect the environment. (oblige)
- Are you all clear now what you have to do?
- Are you all clear now_____ what you have to do? A: about B: on
- ________ you have to do is to press the button. A: So that B: Such that C: All that D: In that
- ________ you have to do is to press the button. A: A.So that B: Such that C: All that D: In that