Knowledge from real life isn't easier to forget than ___ achieved from textbooks．

 _______ worries the public a lot the way the students are getting more and more stressed out.

Despite her illness, Lucy had lost ___of her enthusiasm for life and still made many plans for the future. 

She writes ___ from time to time.

It's an either-or situation - we can buy a new car this year or we can go on holiday but we can’t do ______.