---It is a long time ______ I saw you last．
---Yes．And it will be a long time ______ we see each other again．
| A．when; before | B．after; when | C．since; before | D．since; until |
Except on official such as formal receptions, American society has a certain amount of informality.
| A．cases |
| B．situations |
| C．conditions |
| D．occasions |
There is little doubt in your mind that he is innocent,?
| A．is there |
| B．isn’t there |
| C．is he |
| D．isn’t he |
—Happy birthday!
—Thank you! It is the best present I for.
| A．should have wished |
| B．must have wished |
| C．may have wished |
| D．could have wished |
—I am sorry for being late. I should have telephoned earlier.
. I have just arrived.
| A．That is to trouble |
| B．You are welcome |
| C．That is all right |
| D．You can never tell |
We live in an age____more information is available with greater ease than ever before.
| A．why |
| B．when |
| C．to whom |
| D．on which |