It took me a long time before I was able to fully appreciate what they ______ for me.
| A．had done | B．did | C．would do | D．were doing |
— Did you watch the football match last night?
— Yes, that’s a most close one, and eventually neither could defeat ____.
| A．both | B．the other | C．another | D．each |
They chatted ____ coffee about their experience as volunteers during the charity.
| A．over | B．on | C．to | D．with |
| A．couldn't see | B．shouldn't have seen |
| C．mustn't have seen | D．can't have seen |
| A．extremely | B．basically | C．separately | D．naturally |
| A．trade | B．replace | C．exchange | D．reduce |