We cannot __________ (冒那个险) losing all that money.

A．the similarity of specialists to doctors
B．the comparison between the river and the patient
C．how healthy the Thames is
D．the ways specialists monitor the Thames

A．The child’s brain is highly selective.
B．The faculty of speech is inborn in man.
C．Children do not need to be encouraged to speak.
D．Most children learn their language in definite states.