At the age of 29, Dave was a worker, ______ in a small apartment near Boston and ______ what to do about his future.
Having a trip abroad is certainly good for the old couple, but it remains____ whether they will enjoy it.
Mencius believed that the reason why man is different from animals is______Man is good.
_____ with so much trouble, we failed to complete the task on time
It’s reported that the United States uses______ energy as the whole of Europe.
The rare fish,_____ from the cooking pot, has been returned to the sea.