单项选择题
A.convicted B.sentenced C.arrested D.attacked
He was（）the preparation of an international conference ...
单项选择题He was（）the preparation of an international conference when I arrived in Beijing.
A.engaged to B.engaged for C.engaged on D.engaged in
The population of the earth（）increasing fast. One third...
单项选择题The population of the earth（）increasing fast. One third of the population here（）workers.
A.is;are B.is;hasbeen C.are;is D.is;was
He, as well as I,（）a student.A.beB.amC.areD.is
单项选择题He, as well as I,（）a student.
A.be B.am C.are D.is
