In the forest, sound is the best means of communication over distance ________ in comparison with light, it won't be blocked by trees when travelling.
A. while B. because
C. when D. though
The real winners in sport are those who know how to persevere and to behave with ________—whether they win or lose a game.
A. certainty B. caution
C. dignity D. independence
Thanks to the “sugar tax”， food factories have reduced sugar in their products, ________ about 45 million kilograms of sugar.
A. to save B. saved
C. saving D. having saved
Dave was a ________. Because of his misconduct in class, the whole class had to stay after school.
A. wet blanket B. leading light
C. black sheep D. dark horse
If you want to improve your figure and health, the most effective thing to do is to show up at the gym every time you ________ be there.
A. can B. will
C. may D. shall
As often happens after long sleeplessness, he was ________ by an unreasoning panic.
A. seized B. fascinated
C. impressed D. embarrassed
