－Sixteen-year-olds ________ to drive．
－I agree．They aren't serious enough at that age．
shouldn't be allowed
shouldn't allow
don't allow
are allowed not
科目：初中英語 來源：英語教研室 題型：033
He is sixteen years old．His sister is fourteen．So his sister is y ．
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科目：初中英語 來源：百分百學生作業本 課時3練1測 七年級英語下冊 人教目標版 題型：053
閱讀理解填詞。
When Mary Smith was a student, she always w 1 to be a teacher, because she loved children．When she was twenty-two years old, she began to t 2 in a small school．She was a good t 3 ．The children liked to c 4 to her class．One day one of the girls in her class s 5 to her,“Miss Smith, why does a man's hair become w 6 before his beard(胡子)？”Mary laughed and a 7 ,“I don't know, but it happened to my father．”The o 8 children laughed when they heard this．
Then one of the boys said,“I know, Miss Smith!Men's hair become white b 9 it's sixteen y 10 older than their beard!”
1．w ________ 2．t ________ 3．t ________ 4．c ________ 5．s ________
6．w ________ 7．a ________ 8．o ________ 9．b ________ 10．y ________
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科目：初中英語 來源：同步練習英語 七年級上冊 題型：059
小博士：仔細觀察下面的基數詞和對應的序數詞的區別和變化，你會發現這種變化是有規律的，你能歸納出來嗎？請根據規律填出所缺的基數詞和序數詞，并特別注意黑體字的詞。
one | first | eleven | eleventh | twenty-one | twenty-first |
two | second | twelve | twelfth | twenty-two | twenty-second |
three | third | thirteen | thirteenth | twenty-three | twenty-third |
four | fourth | fourteen | fourteenth | twenty-four | ______ |
five | fifth | fifteen | ______ | twenty-five | twenty-fifth |
six | sixth | sixteen | sixteenth | twenty-six | twenty-sixth |
seven | ______ | seventeen | seventeenth | twenty-seven | twenty-seventh |
eight | eighth | eighteen | eighteenth | twenty-eight | twenty-eighth |
nine | ninth | nineteen | nineteenth | twenty-nine | twenty-ninth |
ten | tenth | twenty | twentieth | thirty | thirtieth |
thirty-one | thirty-first fortieth ninetieth | hundred | hundredth | ||
forty | thousand | thousandth | |||
ninety | million | millionth | |||
我找到規律了！請看：
1 英語序數詞1～19，除first，second，third等特殊形式外，其余的一般是在相應的基數詞后加-th構成。
2 有幾個序數詞加-th時拼法不規則，要注意。如fifth，________ ________ ________。
3 十位整數的序數詞的構成方法是先將其基數詞的詞尾“ty”中的“y”改為“i”，再加“-eth”。如________。
4 基數詞“幾十幾”變成序數詞時，只需將個位數變成序數詞，十位數不變。如________。
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