-----Is there any news for the missing boy?
------Yes, he was observed _______computer games at 8o’clock yesterday.
| A．play | B．played | C．to play | D．playing |
— Do you know _______ they got to know each other?
— It was last year_______ they both taught Chinese in Canada.
| A．When it was that, when | B．when it was that, while |
| C．When it was that, that | D．When it was that, as |
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 |