We have a lot of _____ at Senior High School, and at the same time the _______ in studying we have made is rapid.
What if we meet with a situation_____none of us are able to deal with?
_____has happened many times, children may get drowned in this river.
There is a mountain_____the top is always covered with snow.
The reason_____the manager explained at the meeting sounds reasonable.
I like to go shopping at the weekdays,_____the shop isn’t crowded.