When he _______ the door, he found his keys were nowhere.
“Do you mind if I look at your notes?” “Of course not .______”
________eastward,________ you’ll pass mountains and thousands of lakes and forests.
In western culture,21 was the age________ young people traditionally received a key to their parents’ door, as a symbol of entering adulthood.
It’s easy to become ________to the children you work with.
During________ National Day holiday, I received________ endless messages from interested partners but none were suitable.