问题
单项选择题
Professor Collins was（）of the latest developments in physics because he had been in hospital for several months.
A.unconscious
B.negative
C.robbed
D.ignorant
答案
参考答案：B
搜题请搜索小程序“爱下问搜题”
Professor Collins was（）of the latest developments in physics because he had been in hospital for several months.
A.unconscious
B.negative
C.robbed
D.ignorant
参考答案：B
