Susan's mother looks soyoung. It's hard to imagine she's already in her ______.
句意：苏珊的妈妈看起来那么年轻。能以想像她已经六十多数了。在某人的几十岁：in one’s+整十的复数形式。故选B。
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.
Sweet wormwood(青蒿)is a common plant inChina and Tu Youyou is the woman _________used the special power of the plantto save __________lives.
