A red sky in the morning _____ to be a sign of bad weather.
Our company has been very____ to react to foreign competition. Most of our products are out of fashion.
It is really a bad news that after his father died last year his mother ______ a terrible disease this year! How sad he is now!
You'd better stay at school now. Look! The sky is overcast with dark clouds. I'm afraid _____ rain is going to fall.
Let's hurry to _____ that bus or we'll be late for school.
Though Queen Elizabeth is in her late seventies, she is still _____ in thinking.