Visitors ________ not to touch the exhibits.

A．will request B．are requested

C．are requesting D．request

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

All the preparations for the task ________，and we're ready to start.

A．completed B．complete

C．had been completed D．have been completed

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

The discussion ________ alive when an interesting topic was brought in.

A．was coming B．had come

C．has come D．came

—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

It seems that water from this tap ________ for some time.We'll have to take it apart to put it right.

A．had leaked B．is leaking

C．leaked D．has been leaking

—Take this medicine three times a day，Tom!

—Do I have to take it？It ________ so terrible.

A．is tasting B．is tasted

C．tastes D．has tasted

(2013·福建，26)The girl has a great interest in sport and ________ badminton classes twice a week over the last three years.

A．took B．is taking

C．takes D．has been taking

(2013·北京，28)Hurry up! Mark and Carl ________ us.

A．expect B．are expecting

C．have expected D．will expect