This test ________ a number of multiple choice questions.

设A，B=,则A与B=（）

Only a(n) ________ few were invited to the dancing party.

新民主主义社会是 _______。

没实数 a,b 満足 ab=6 ，|a+b| +|a-b|=6 ，则 a2+b2=( )

设A为三阶矩阵,P为可逆矩阵,使得P-1AP=012

则下列结论正确的是（）

When I came through the customs at the airport, I had to pay ________ on a clock I had bought.

After so many days without rain, the ground quickly ________ the little rain that fell last night.

________, John has been to several foreign countries.