--- I called you at seven o’clock yesterday evening. But _________ answered the phone.---I was cooking in the kitchen then, so I didn’t hear it.
The two kinds of cellphones differ __________ shape, but they are similar __________ each other in some functions.
(2012·浙江) According to scientists, mental abilities begin to __________ from the age of 27 after reaching the highest level at 22.
(2012·安徽) The athlete's years of hard training __________ when she finally won the Olympic gold medal.
The officer insisted that Michael did not follow the correct __________ in applying for a visa.
I wasn't blaming anyone; I__________ said errors like this could be avoided.