—I hear Jane has gone to the Holy Island for her holiday.
—Oh，how nice！Do you know when she ________？
A．was leaving B．had left
C．has left D．left
The discussion ________ alive when an interesting topic was brought in.
A．was coming B．had come
C．has come D．came
My mind wasn't on what he was saying，so I'm afraid I ________ half of it.
A．was missing B．had missed
C．will miss D．missed
All the preparations for the task ________，and we're ready to start.
A．completed B．complete
C．had been completed D．have been completed
Selecting a mobile phone for personal use is not an easy task because technology ________ so rapidly.
A．is changing B．has changed
C．will have changed D．will change
Visitors ________ not to touch the exhibits.
A．will request B．are requested
C．are requesting D．request
