minakoです。
早速昨日の答えあわせから
While earning her degree, Ms.Duthuit .......................................
a) worked every summer
b) every summer was working
c) every summer worked
d) was every summer working
答えはa)
亀吉（definite frequency) 戦略。everyは文末にくるべし！
明日はConjunction
DEVELOP Language Institute