1. The problem seemed difficult at _____ first sight, but it became easy when I read it ______ second time.
A. /; / B. the; the C. /; a D. the; a
2. With her dearest grandma’s _______, the poor girl had nobody to rely on and felt much lonelier.
A. passing away B. being passed away
C. dying away D. being died away
3. Bill works hard at school and has a good _______ for knowledge.
A. attraction B. interest C. curiosity D. appetite
