.
---__________ that he managed to get the information?
---Oh, a friend of his helped him.
| A．Where was it | B．What was it | C．How was it | D．Why was it |
Keep up good state of mind even if you___________ fail plenty of times.
| A．must | B．will | C．can | D．should |
People greatly__________ in their views of life.
| A．lead | B．differ | C．bring | D．struggle |
You look so tired tonight. It is high time you_________.
| A．went to bed | B．went to sleep | C．go to bed | D．to sleep |
--I don't think we have met before.
--Yes, once at a party, but we___________.
| A．weren't introduced | B．didn't introduce |
| C．haven't introduced | D．were not introducing |
Our new house is very___________ for me as I can get to the office in five minutes
| A．convenient | B．comfortable | C．natural | D．helpful |