--- Do you know _____________?
--- Sorry, I have no idea. I’ll search the Internet to find it out.
| A．where will the next Expo be held |
| B．when will the next Expo start |
| C．what will the next Expo be held for |
| D．how many countries will take part in the next Expo |
Trees can stop the sand _____ towards the rich farmland in the south.
| A．moved | B．to move |
| C．from moving | D．moves |
This is the most beautiful butterfly I have _____ seen in my life..
| A．ever | B．still | C．never | D．been |
—What are you reading about?
—It’s about the one-child policy. It says that the policy has_____ controlling the population in China.
| A．been good at | B．taken good care of |
| C．worked well in | D．got on well with |
Maria has _____ trouble _____ math, so she often asks her math teacher for help.
| A．much, understanding | B．no, with |
| C．many, understanding | D．not, to understand |
The rivers in Changshun are clearer than _____ in Wuhan..
| A．that | B．it | C．one | D．those |