It is difficult _____ baby pandas _____ live alone in the wild.
| A．for, for | B．to, to |
| C．for, to | D．to, for |
It is winter now. The weather in Nanjing is becoming.
| A．hotter and hotter | B．colder and colder |
| C．longer and longer | D．shorter and shorter |
We call her Xi Wang. What is the sentence structure?
| A．S+V | B．S+V+O |
| C．S+V+DO+OC | D．S+V+IO+DO |
I always go to Mochou Lake Park at weekends and enjoy ___________ there.
| A．ourselves | B．yourselves |
| C．myself | D．himself |
There was a lot of traffic on the way, so it ________ us about three hours to get there.
| A．used | B．paid | C．spent | D．took |