-Try not to work yourself too hard. Take it easy.-Thanks. (2012 .全国Ⅱ)
Only when your identity has been checked, ________.
“Have great changes taken place in your village?” “Yes, A new school was ______ in the village last year.”
The woman sold the eggs ________ seven dollars and they were sold ________ half price.
I’ve kept up a friendship with a girl whom I was at school ________ twenty years ago.
In the experiment we kept a watchful eye ________ the developments and recorded every detail.