His friends ignored his advice, ______ they knew it to be helpful.
Have you forgotten________a ruler from Tom?Please remember________it to him tomorrow.
—It's better for you to listen more in your spare time.—I think your suggestion deserves________.
That is to say,missing the chance means________for another year.
I still remember________to the Famen Temple and what I saw there.
In some cities the traffic police use computers to keep the traffic________smoothly.