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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推荐题目
. She made a promise _______ anyone could save her life, she would give him all her wealth.
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which if
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that if
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that
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if
You will succeed in the end __________ you give up halfway.
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even if
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as though
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as long as
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unless
It is such a modem machine ____few of the workers know how to operate it.
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which
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that
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as
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the one
The boy was so tired that he fell asleep _______ his mother could take off his clothes.
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before
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after
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while
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when
_________ they were here now, we would be able to celebrate their wedding anniversary.
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Only if
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If only
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Because
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When