16．After driving for 20 miles, Jackson realized that he______in the wrong direction.
| A．was driving | B．drove | C．had been driving | D．had driven |
Great changes have taken place in that school. It is no longerit was 20 years ago，_____ it was so poorly equipped．
| A．what；when | B．that；which | C．what; which | D．which；that |
The employee proved ___________ to the job and the boss praised him.
| A．suitable | B．adequate | C．fit | D．useful |
The young couple decided to their wedding until all the details were taken care of .
| A．announce | B．maintain | C．postpone | D．simplify |
He was a(n) ___________singer until the age of 40, when he turned professional.
| A．gifted | B．amateur | C．sacred | D．entire |
Contrary to what I had expected, he lost for ______.
| A．second time | B．a second time | C．second times | D．the second time |