The book I bought from the bookstore isn’t here. Who __________?
| A．could have taken it | B．must have taken it |
| C．might take it | D．should take it. |
_____ you go, don't forget your people.
| A．Whenever | B．However | C．Wherever | D．Whichever |
It is about ten years _____ I met you last.
| A．since | B．for | C．when | D．as |
They will never succeed, _____ hard they try.
| A．because | B．however | C．when | D．since |
_____ still half drunk, he made his way home.
| A．When | B．Because | C．Though | D．As |
_____ she was very tired, she went on working.
| A．As | B．Although | C．Even | D．In spite of |