21.For all the Chinese across the world, we have ____ same name
—We are ____ Chinese.
A.the; 不填 B.the; a C.a; 不填 D.the; the
22.She was surprised to find the classroom empty; all the students ____,
A.have gone B.had gone C.was going D.went
23.The twin boys are so alike that even their relatives, including their uncle, find ____ hard to tell them apart.
A.them B.that C.it D.him
24.For the survey, investigators collected data on more than 1,200 people, aged 70 to 89, ____in the south of Xinjiang.
A.to live B.living C.lived D.having lived