The theory he had stuck _______ to be true.
| A．proved | B．to proving | C．to prove | D．to proved |
Sun Yang, a young Chinese swimming talent, several gold medals before the 2012 London Olympics.
| A．won | B．has won | C．had won | D．were to win |
In hot summer, milk quickly turns sour it is refrigerated.
| A．while | B．if | C．until | D．unless |
He found himselfby a crowd of excited people and to escape.
| A．surrounded; trying | B．surrounding; trying |
| C．surrounding; tried | D．surrounded; tried |
---John, why are you so upset?
---Imy cell phone all morning but it is nowhere to be found.
| A．am looking for | B．have looked for |
| C．have been looking for | D．had looked for |
- A lovely day, isn’t it?
-- Yes. I love when the weather is like this. Why not have our lunch outside?
| A．this | B．it | C．one | D．That |