The word "undermining" in the passage mostly means "_____".
undermining = hủy hoại, làm suy yếu; making less effective = làm cho kém hiệu quả.
The examination was not very difficult, but it was_____________________ long.
_______ has been a topic of continual geological research.
It is stated in the passage that____________________ .
The boat was sailing north when a terrible storm_____________ .
Regular exercise and good diet will bring______fitness and health.
We must push the piano to the corner of the hall to_____________________ our party tonight.
Only one of our gifted students______to participate in the final competition.
The phrase "keeps sellers on their toes" in the passage mostly means "______".
Stephanie: "Oh, no! I left my book at home. Can I share yours?" Scott: "______ "
______ his brother, Mike is active and friendly.