The （） British theoretical physicist Stephen Hawking once said in an interview that heaven is a fairy story for people afraid of the dark.

单项选择题The market for dust masks and air purifiers is（） in Beijing because the capital has been shrouded for several days in thick fog and haze.

A. booming
B. looming
C. dooming
D. zooming

单项选择题Gangnam Style , the （） popular song from South Korean recording artist PSY has just become the most watched video on YouTube ever.

A. sanely
B. insanely
C. rationally
D. insatiably