Mr. Wang would have continued to lead _____ poor life instead of changing his lifestyle if he hadn’t met Mr. Smith by _____ chance who was a businessman.
The result suggests that she________her best to study English since then.
We followed their suggestion that we________right now.
It's surprising that your brother ________Russian so quickly—he hasn't lived there very long.
You'd better________ the instructions so that the children could understand them.
I'd like to take________of this opportunity to thank you for your help.