We began to open to the outside world in the ate 1970s. , there have been great changes in the country.
A．As a result of B．As a result C．First of a11 D．After all
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 himself by 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?
---I my 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
