86. In the following spring , the seeds should be knocked _______ the seed-heads and sown .
To help Tom improve his English, I_______ that he take some online courses.
After retirement, she _____ herself in _______the poor children.
Preparations have been ______for the project and it can be started at any moment.
The professor, ________ his assistants, _______ conducting the experiment.
--- Did you have a good time at the party? --- Thanks. I appreciated _________ to your home.