______ ，you can't lift the heavy box up.
| A．Even you are strong | B．Strong as you are |
| C．How strong you are | D．As you are strong |
His friends ignored his advice, ______ they knew it to be helpful.
| A．as if | B．since | C．even if | D．so that |
I ______ along the road when I saw Peter. So we stopped and had a chat.
| A．walked | B．was walking | C．would walk | D．had walked |
Betty will ring me up as soon as she ______ in Beijing.
| A．arrive | B．arrives | C．arrived | D．will arrive |
The teacher requested that we ______ the classroom after using it.
| A．cleaned | B．cleaning | C．to clean | D．clean |
The moment I met you, I ______ you though I hadn’t seen you for about ten years.
| A．saw | B．recognized | C．knew | D．watched |