They built a highway _______ the mountains.
A、leadintoD
leadinginto的逻辑主语是highway，它们之间是主动的关系，所以用动名词形式。句意：他们修建了一条通往山里的公路
Heboughtahouseforhischildren________
He bought a house for his children ________
名词解释：offer
Sofarscientistshaveonlyacquired________understandingofthephysicalprocessesthatcauseearthquakes.
Thetrafficwasheldupformorethanthirtyminutes,________causedmetoarrivelate.
