China _______ a lot in the last few years．Now it has become one of the strongest _______ in the world.
| A．changes, countries | B．changed, country |
| C．has changed, countries | D．had changed, countries |
—I was at the cinema at 8 o’clock last night．What about you?
—I________the Internet at home．
| A．am surfing |
| B．surfed |
| C．will surf |
| D．was surfing |
They thought about________some photos in Beijing．
| A．take |
| B．to take |
| C．taking |
| D．took |
The man followed the boy________what he wanted________in the small room．
| A．to see；to do |
| B．to see；do |
| C．see；to do |
| D．see；do |
When I left my office，I saw the headmaster________to some students at the school gate．
| A．talk |
| B．talking |
| C．talks |
| D．to talk |
I________my clothes when the phone rang．
| A．wash |
| B．washed |
| C．am washing |
| D．was washing |