– How ______ Jack? -- He is fine.
A.are
B.is
C.am
D./
答案:B
能和单个人名字连用的be动词为is,故选答案为B
It is reported that the Underground Line No.3 _____ in our city in 2012. [ ]
A. will build
B. has built
C. will be built
D. has been built
采用变压运行的机组比采用定压运行的机组的运行经济性要高。