David is a skillful worker. I’m sure he has enough _______ to fix all the electronic ______.

There is a 20 minute parking _____ here, so we must get back to the car very quickly.

He devoted himself entirely to his research into viruses and it earned him a good _________in his field.

Thanks to the modern electrical_____, housework nowadays has been made easier and easier.

Many students like to recite       , which are short,beautiful and rhythmic.