GRE Text Completion: Fundamental 24 Sets-GRE填空基础24套 - S8RCUJ48444MO8R5!

Astronomer Heidi Hammel, a proponent of science education, conveys a passion for planetary science that her enraptured audiences find ____________. A. duplicitous B. infectious C. timorous D. equivocal E. contagious F. trepid