In winter people usually keep flowers in their houses to ___them from the cold.

Where is your father— He ____to Shanghai. He’ll be back next week.

Everybodywas touched words after theyheard her moving story

As the final exam is coming, the teachers are busy ___________ the test papers.

Though he is in his late sixties, the well-known biologist begins each day ____ a sense of adventure and a sense of curiosity