By the time Jack returned home from England, his son __________ from college.
| A．graduated |
| B．has graduated |
| C．had been graduating |
| D．had graduated |
We travelled together as far as Chicago, _____ we said goodbye to each other.
| A．which | B．when | C．why | D．where |
_____ was expected, he failed in the exam.
| A．That | B．As | C．Which | D．It |
With the guide _______ the way, we finally got to the village which we were looking for.
| A．led | B．leading | C．to lead | D．had led |
I was about to go to bed _____ one of my old classmates made a call to me.
| A．when | B．as | C．while | D．that |
Mr King, _____ legs were badly hurt, was quickly taken to hospital.
| A．who | B．that | C．whom | D．whose |