单项选择题

The young parrot (is) totally (dependence) on (parental) care after (hatching).（）

A. is
B. dependence
C. parental
D. hatching

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单项选择题
The (scientific) revolution of the early 1900s (affected) education by (change) the nature of (technology).（）

A. scientific
B. affected
C. change
D. technology
单项选择题
(Alike) light (waves), microwaves (may be) reflected and (concentrated).（）

A. Alike
B. waves
C. may be
D. concentrated
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