Though he is in his late sixties, the well-known biologist begins each day ____ a sense of adventure and a sense of curiosity.
Books are a worthy invention of human history since they make it possible for us to make a __ of human's thoughts.
—When shall we go for an outing? —It's up to you. Make ittime you like.
—When did she get injured? —It was at midnightrain was pouring down.
Gillard's ride totop of Australian politics wasrough one.
Wherever such an area is located, it will be immediately ______ by the enemy if armed forces are lacking.