An unhappy childhood may have some negative effects on a person’s character；however，they are not always _____.

Next to the school _________ a house __________ an interesting pool.

. —When did your school hold the sports meet—Last week. And I _______ the girls’ 400-metre race.

Some people disagree with the idea _____digital textbook will improve education quality while the traditional textbookis out of date.

It was not until mid-nighttheyreached the camp site.