A successful scientist needs _____ if he wants to make hypothesis (假设) of how processes work and how events take place.
What time did you finally ___ asleep?
The forest ___ for miles.
The driver tried to ___ the accident by stopping the car suddenly.
Keep the picture carefully, it ___ a lot of money. A is worth B. worthed C. is worthy of D. worths
His good salary __ him to live in a lovely country house.