The engineer ______my father works is about 50 years old.
______ herself in looking after the newly-born twins, she had to sacrifice her career to stay with her kids.
--- What is your strongest memory of the bombing attack?--- If I ______ rightly, we were about to approach the finish line when a big bang struck my ears.
More and more people have come to realize that if we had taken effective measures much earlier, the air quality ______ so seriously now.
As for friendship, remember that no time is ever wasted _______ makes two people better friends.
The golden rule is not to waste time waiting for opportunity. Begin, ______ opportunity will find you.