In early grades, the use of so-called token economies, in which students handle challenging problems and receive performance-based points to ward valued rewards, shows __10__ in raising efforts and creativity, the Delaware psychologist claims.
A)mental
B)promise
C)kill
D)avoid
E)hope
F)especially
G)aid
H)ordinary
I)approval
J)monetary
K)generally
L)improve
M)challenging
N)restore
O)excellent
答案解析:
1. L
2. I
3. F
4. J
5. G
6. M
7. C
8. H
9. N
10. B
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