—Was it 11 o'clock ________ your father came back last night?
—Yes, he is always coming back so late.
A．that B．while
C．when D．until
—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
