The witness who appeared in court ---- to speak out the trut

The witness who appeared in court ____ to speak out the truth instead of covering it up．
A．encouraged B．has been encouraging
C．was encouraging D．had been encouraged
为什么选D
I am wondering ____ he expects will win the gold medal in Men’s Single．
A．whom B．who C．which D．what
选B不选A,为什么
．—Do you regret paying twenty dollars for the dictionary?
—No．I ____ twice as much for it．
A．gladly paid B．should gladly pay C．would gladly have paid D．had gladly paid
选C