________ men have learned much from the behaviour of animals is hardly new.
A: What
B: Those
C: That
D: Whether
A: What
B: Those
C: That
D: Whether
举一反三
- ____ men have learned much from the behavior of animals is hardly new.
- （）men have learned much from the behavior of animals is brand-new. A: That B: What C: Those D: Whether
- ________ they have written about the behaviors of animals is hardly anything new.
- They got much ________ from those new books.
- Families,( ) those with young children, have learned a lot from the program.