---Is Johnson on duty today?
---It ________ be him, but I’m not sure.
| A．will | B．may |
| C．need | D．must |
----You forgot your keys when you left home in the morning.
----Good heavens, ___________.
| A．so did I. | B．so I did. | C．so you did. | D．so did you. |
Was it not until you began to work ______ how much time you had wasted?
| A．did you realize | B．that you realized |
| C．did you not realize | D．that you didn’t realize |
A man does not know the difficulty of anything_________ he does it personally.
| A．although | B．if | C．because | D．unless |
I caught the last bus from town, but Harry came home___________ that night.
| A．very late | B．even later | C．the same late | D．the last one |
Mrs. Green wants to buy that kind of cloth because she___________ that the cloth__________ very well.
| A．has been told; washes | B．is told; is washed |
| C．has been told; is washed | D．is told; is washed |