—Shall I help you carry your travel case to the train ,Granny? —Oh,no,my boy.It is heavy.Thank you anyway.
22. He demanded that such things_____ from happening again.
21._____by a desire to learn, he was not interested in children’s play and adventure when he was young.
20. The flu is believed________by viruses.
19. They________a lot of suggestions for improving the workers’ living conditions.
18. After having gone____-far, I didn’t want to turn back.