I was 8 years old whenmy father was 31. This year my father is twice my age. How old am I?
句意：我父亲31岁的时候，我8岁。今年我父亲的年龄是我的两倍。我多大了？
考查数字运算。twenty二十；twenty-one二十一；twenty-two二十二；twenty-three二十三。31－8=23，我和父亲相差23岁，所以当我的年龄和年龄差一样时，父亲年龄正好是我的两倍，所以我的年龄是23。故选D。
I was 8 years old whenmy father was 31. This year my father is twice my age. How old am I?
Susan's mother looks soyoung. It's hard to imagine she's already in her ______.
There are fifty studentsin this class, ________ of them are boys, so the number of the boys is 30.
—________ of the city________ covered with parks and gardens.
—Wow, it’s really a green city.
—Susan, how many womenteachers are there in your school?
—Inour school, _______of the teachers _______ women teachers.
About ________ of thestudents in Kaili ________ to school boy bus.
—Dear, how is yourhomework going?
—Oh, mom, I've justfinished ________ of it.
Now, everybody, pleaseturn to Page ________ and look at the ________picture.
Five ________ new bookswere sold out last month.
—China is a greatcountry with a history of about five ______ years.
—Yes. And ______ of foreigners come tovisit it every year.
