31. I am not a heavy drinker, but I like the ______ glass of wine.
| A．occasional | B．light | C．frequent | D．Rare |
When asked why he went there, he said he was sent there ____ for a space flight.
| A．training | B．being trained | C．to have trained | D．to be trained |
______ their hats into the air, the fans of the winning team let out loud shouts of victory.
| A．To throw | B．Thrown | C．Throwing | D．Being thrown |
They desired that they _____ the right to vote.
| A．had | B．have | C．are | D．were |
As the boy listened attentively in class, everything his teacher said was easily______.
| A．for him to understand | B．understood | C．to understand | D．to be understood |
Mary is said _____ in the supermarket for 5 years, but I don’t know why she resigned last month.
| A．to have been working | B．work | C．to be working | D．to have worked |