Please remember _______ the plants while I’m away.
He always takes full _____ of the mistakes made by his rivals(对手) to win the election.
Some researchers believe that there is no doubt _____ a cure for AIDS will be found.
Use the umbrella to ______ yourself from the rain.
____ for a long time, but he managed to catch up with his classmates at last.
We mustn’t waste anything; ______, we mustn’t waste our time.