—We really shouldn’t use plastic bags any more when shopping.
—_____ It’s important to protect our environment.
| A．So do I. | B．With pleasure. |
| C．That’s OK. | D．So it is. |
_____he is very tired , _____he still goes on working.
| A．Although, but | B．But, although |
| C．Although, / | D．But, / |
When we went into the park, we saw someone _____ Chinese Kungfu.
| A．plays | B．played | C．to play | D．playing |
Imy homework, I guess I can't join you.
| A．don't finish | B．didn't finish |
| C．haven't finished | D．won't finish |
What can we students do _____ the environment?
| A．to protect | B．protected |
| C．protecting | D．protects |