F、表约数:
表不确定的数字时,数词用复数。
若带名词,再加of
如:hundreds of(数百,成百上千的),thousands of(数干,成千上万的),millions of(数百万的)
G、数学运算的表达
eg.3+5=8 Three plus/and five is eight.
9-2=7 Nine minus two is seven.
6x5=30 Five times six is thirty
82=4 Eight divided by two is four.
练习
( )1.If you go out at night, youll be able to see ____ starts.
A. thousands of B. thousand of
C. nine thousands of D. thousands
( )2.Monday is ___ day of the week.
A. first B. the first
C. the second D. second
( )3.Youve done it twice. Why not try ____ time?
A. third B. the third C. a third D. once
( )4.Which is the____ month? Its September.
A. nine B. nineth C. ninth D. ninety
( )5.December is ___ of the year.
A. the twelfth months B. the twelfth month
C. the twelveth months D. twelve months
( )6.There are ___ floors in the building and he lives on the ____ floor.
A. eighteen, fifteen B. eighteenth, fifteenth
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