——I went to Hu’guang Guild Hall this National holiday．
——Ah，amazing! That is I’ve been dreaming to go．
| A．why | B．when |
| C．where | D．which |
According to the latest investigation，most mistakes be prevented if students are careful enough．
| A．must | B．can | C．have to | D．need |
According to Xi, common values held by Chinese people of all ethnic groups are ________ for the country's future and its people's well-being.
| A．affectionate | B．responsible | C．reliable | D．essential |
We were delayed at the train station．Otherwise，we here by lunch．
| A．must have been | B．could be |
| C．should be | D．would have been |
The teaching building, to be environmentally friendly, will be completed next year.
| A．designed | B．designing |
| C．being designed | D．having designed |
The president stressed that young people's values determine the values of the future society, and more efforts should be made to ensure young people's cultivation of sound value systems, ________ are still in the formation stage.
| A．which | B．what | C．when | D．where |