The two girls are so alike that strangers find ________ difficult to tell one from the other. (2011·山东,24)
On receiving a phone call from his wife ___ she had a fall, Mr Gordon immediately rushed home from office.
It is the most instructive lecture that I ___ since I came to this school.
He decided that he would drive all the way home instead of ___ at a hotel for the night.
Look over there——there’s a very long,winding path ___ up to the house.
He got up late and hurried to his office, ___ the breakfast untouched.