He recommended us ________ English every day.
On AIDS Day, the minister of Health Department demanded that the problems ______ paid special attention to.
The shop has been standing so ______ that a thief finds nothing to steal.
They talked for about an hour of things and persons ______ they remembered in the school.
--Is it all right if I use your car ? ----
Our school has developed a learning system students can do a lot of teamwork.