The reason ________ he hasn’t come is ________.
This book ______ 50 maps, _______ 20 of America’s.
My sister, who isa red sweater now,a foreigner for 3 years.
Today, we’ll discuss a number of cases beginners of English fail to use the language properly.
The Yangtze River is almost ______ the Pearl River.
Recently I bought a secondhand car, was very low.