I doubt _______ they can complete the bridge ahead of time.
A、whetherB
这里表示的是：来的方式，要用how.
Round the corner was a building _____ windows were all broken.
The plants need sand with a___ (deep) of at least 10 to 15 cm to grow.
This advertisement is a___(type)example of their marketing strategy.
Nowthatyouknowallthefacts，youcanmakeaninformed___(choose).
Whentheshiplostitsenginepower,thecrewfoundthemselvesatthe_________ofthewind.
