He is afraid to face the difficulty he thinks he’ll have _________ the driving test tomorrow; he finds it difficult _________ rid of the worries.
After a knock at the door, the child heard his mother’s voice ______ him.
Pop music is such an important part of society ______ it has even influenced our language.
With the help of high technology, more and more new substances ______ in the past years.
--- Guess what! I have got A for my term paper.--- Great! You ______ read widely and put a lot of work into it.
--- Did you tidy your room? --- No, I was going to tidy my room but I ______ visitors.