Taking this medicine,if__________,will of course do good to his health.
Knowing how long the test would last, the students who finished _______ back and waited until the end of the exam.
I thought things would get better, but _______ it is they are getting worse.
The dull wetland _______ the moment the first ray of sunlight shines on it. Thousands of creatures living in it wake up and begin their life of a new day.
Experts say walking is one of the best ways for a person to _______ healthy.
_______ unexpected heavy rain usually causes _______ great change.