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where can we buy the tickets how much it costs to fly to Shanghai who is he waiting for why was he late for school this morning
5- BU诱发突变的机制是诱发DNA链发生碱基种类替换 5- BU诱发突变的机制是阻止碱基配对 培养过程中可导致A/T对变成G/C对，或G/C对变成A/T对 5- BU诱发突变发生在DNA分子复制过程中
When he saw Hollopeter fall, Wesley Autrey was waiting for someone alone. When he saw Hollopeter fall, he thought over a long period of time before he jumped onto the tracks. After he saw Hollopeter fall, he made a quick decision and pulled the young man out of the track as soon as possible. After he saw Hollopeter fall, he quickly made a decision to protect Hollopeter from harm.
it's great fun for people to fly a kite in light wind what is wind high winds are very dangerous people can feel wind, hear wind but can't see wind
except provided although where
mustn’t needn’t can’t couldn’t
mustn’t needn’t can’t couldn’t
the moon is 240 kilometer far away we don't know where it is it can't fly without air there is no air on the moon
would not do it again for he was afraid of losing his own life would do it again for getting another piece of Bronze Medallion would do it again so as to get another 15000-dollar cheque as a prize would also do it out of his own conscience
mustn’t needn’t can’t couldn’t
to step of stepping to fall of falling
can can’t be able to be not able to
the moon is 240 kilometer far away we don't know where it is it can't fly without air there is no air on the moon
the moon is 240 kilometer far away we don't know where it is it can't fly without air there is no air on the moon
5－BU诱发突变的机制是诱发DNA链发生碱基种类替换 5－BU诱发突变的机制是阻止碱基配对 培养过程中可导致A/T对变成G/C对，或G/C对变成A/T对 5－BU诱发突变发生在DNA分子复制过程中
a cheque of $10,000 a limousine the Bronze Medallion a cheque of $5,000
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