She____the sick baby for three days.
A. looked down
B. looked for
C. looked into
D. looked after
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John lives inLondon which is on()Thames.
A. the
B. a
C. an
D. *
Why is Britainsometimes called()UnitedKingdom?
A. a
B. the
A . 酸度计
B . 紫外
C . 原子吸收
D . 红外