It is often recommended that children _____ chances to get close to nature.
| A．are offered | B．be offered | C．should offer | D．must be offered |
-----Is this the first time you______ Chengdu?
-----No. But the first time I______ here, the city wasn’t so beautiful
| A．visited; came | B．visited; have come |
| C．have visited ; have come | D．have visited; came |
Has the doctor _______ called for?
| A．referred to being | B．referred to been |
| C．referring to being | D．referred to be |
Mr Smith has a lot of business______. I know by______ that this man cannot be trusted.
| A．experience; experience | B．experiences; experience |
| C．experience; experiences | D．experiences; experiences |
We _______ on this project for four hours. Let’s have a rest.
| A．are working | B．have been working |
| C．worked | D．had worked |
This dictionary is_______ to my translation, but that one is________.
| A．a great help ; of no use | B．very helpful; of no any use |
| C．great help; helpless | D．important; of few importance |