The problem is _______ we should do to protect the earth.
A: that
B: what
C: who
D: which
A: that
B: what
C: who
D: which
举一反三
- The problem is what we should do next.
- What should we do to _____________ environment in daily life? A: smoke B: stop C: protect D: smog
- Would you please tell me () next , Mr Wang ? A: what should we do B: we should do what C: what we should do D: should we do what
- What should we do to _____________ environment in daily life?(1.3) A: smoke B: stop C: smog D: protect
- The question is_______. A: why should we do first B: what should we do first C: what we should do first D: that should we do first