We _______ on this project for four hours. Let’s have a rest.
| A．are working | B．have been working | C．worked | D．had worked |
It's everybody's desire that every effort___________to reduce the pollution in our city.
| A．be made | B．is made | C．will bi made | D．must be made |
Mary waited for a reply, but__________came.
| A．no one | B．none | C．nothing | D．neither |
Mo Yan's winning of 2012 Nobel Prize shows the world's________of China" contemporary literature.
| A．realization | B．intention | C．connection | D．recognition |
-You seem to be familiar with this city.
-I_______here for three years. It's great to be back.
| A．would live | B．had lived | C．lived | D．live |
The air quality in our city, _____is shown in the report, has improved a lot recently.
| A．that | B．what | C．where | D．as |