It was announced that only when the examination papers were handed in ________to go out of the classroom．
| A．the students would be permitted | B．had the students been permitted |
| C．would the students be permitted | D．the students had been permitted |
You didn ’ t let me drive. If we _____ in turn, you ______ so tired.
| A．has left; comes | B．drove; wouldn’t have got |
| C．were driving; wouldn’t get | D．had driven; wouldn’t have got |
His writing is so confusing that it's difficult to make out ________ he is trying to express.
| A．what is it | B．what is it that | C．what is that | D．what it is that |
It’s extremely dangerous for the drivers to _______ speed as the traffic lights are changing．
| A．pull up | B．put up | C．rise up | D．pick up |
Writing out all the invitations by hand was more time-consuming than we______.
| A．will expect | B．are expecting | C．expect | D．had expected |
China's reform and opening has been going on for ________ is like about 30 years now and it's really quite remarkable.
| A．that | B．which | C．what | D．it |