问题
The scientist knows nothing about the matter, because he is always ______ himself in scientific study.
A:burying
B:devoting
C:focusing
D:concentrating;
B:devoting
C:focusing
D:concentrating;
正确答案是：
同类题型
Was it because Jack came late for school _______ Mr. Smith got angry
What about doing__________for the homeless people—Good idea!
Look! What a nice and clean toilet! —Yes. It ______ every morning.
Housing prices in Beijing and Shanghai are now largely ________ for lowincome families.
It was never clear ________ the man hadn’t reported the accident sooner.(2011·江苏)