---Excuse me. You shouldn’t smoke here. Look at the sign “NO SMOKING HERE”.
--Sorry, I ________ it just now.
| A．doesn’t see | B．haven’t seen | C．didn’t see | D．hadn’t seen |
—I don't mind how you do it ______ you finish the painting on time.
—OK, I see.
| A．as well as | B．as far as |
| C．as long as | D．as fast as |
You seem to have a readymade answer ________ I ask you a question.
| A．whenever | B．whatever |
| C．whichever | D．whoever |
Steve was busy clearing the cups and dishes from the table ________ others were playing.
| A．until | B．if |
| C．since | D．while |
________ it is, the boy never seems to be able to finish it off.
| A．However interesting a book |
| B．Whatever interesting a book |
| C．How interesting a book |
| D．What an interesting book |
The new system needs to be in operation for five months ________ it can be updated.
| A．as | B．while |
| C．before | D．once |