--I’m going to the post office. ---____ you’re there, can you get me some stamps?
| A．As | B．While | C．Because | D．If |
the players didn’t have a good rest shouldn’t be all excuse for losing the game．
| A．That | B．What | C．Why | D．Whether |
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 |