Why not the swimming club?
| A．to join | B．join |
| C．joining | D．to join in |
Her husband _____ for 20 years, but she still lives lonely.
| A．died | B．has died |
| C．has been dead | D．has been died |
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 |