________, I think, and the problem could be settled.
| A．So long as you keep up your spirits | B．A bit more effort |
| C．If you doubt your efforts | D．Making great efforts |
There is hardly an environment on earth _____ some species of animals or other have not adapted successfully.
| A．in which | B．on which | C．to which | D．for which |
I like this jacket better than that one, but it costs almost three times______.
| A．as much | B．as many | C．so much | D．so many |
It was hard for him to learn English in a family, in which _____ of the parents spoke the language.
| A．none | B．neither | C．both | D．each |
—He doesn’t have_____furniture in his room.
—Just an old desk.
| A．any | B．many | C．some | D．much |
Our nerghbors gave _____ a baby bird yesterday that hurt ______ when it fell from its nest.
| A．us, it | B．us, itself | C．ourselves, itself | D．ourselves, it |