it is normal for parrots to talk, Einstein, a small bird, is unusual in that whenever she hears a new word or sound, she repeats it over and over until she masters it.
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As
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When
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While
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Since
推荐题目
I’d like to study law at university __________ my cousin prefers geography.
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though
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as
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while
D
for
The boss refused to sell the car for ________ he thought was not satisfactory.
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that
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which
C
how
D
what
There is hard evidence ________ George has something to do with the murder.
#30750
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which
B
what
C
why
D
that
Mother was busy washing dishes ________________ Father was watching TV．
#30098
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until
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if
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since
D
while
—Did you return Fred’s call?—I didn’t need to ____ I’ll see him tomorrow.
#79777
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though
B
unless
C
when
D
because