Two explosions near the finish line of the Boston Marathon killed at least 3 people and injured more than 180 others, and currently FBI has figured out how it __________.
It is hard to avoid mistakes. you correct them, it will be all right.
Ivy told Nancy that she what she was doing during the vacation.
Tom is an aggressive but easygoing person, will succeed whatever career he chooses.
----- Believe it or not, my sister and I are twins. ----Oh, you must have had the case ________ you were taken for your sister.
_____ you are in a speech contest or you are giving a talk in class, a little preparation will make your presentation organized and dynamic.