It was really noisy in the workshop. Not until ______ at the top of my voice ______ to look at me.
| A．did I shout; he turned | B．had I shouted; had he turned |
| C．did I shout; did he turn | D．had I shouted; he turns |
Carbon dioxide from burning fuels is the most common of the so – called greenhouse gases．
| A．producing | B．having been produced |
| C．to be produced | D．produced |
Because of the Russian gas limit to Europe, attempts to use botanical fuel as a source of power．
| A．have made | B．having made |
| C．are being made | D．will be making |
--- Where did you get your laptop? I’d like to get one．
--- Well, at shop on Avenue 48, but I can’t say exactly．
| A．some | B．any | C．each | D．every |
In China, car is becoming popular means of transportation．
| A．a; the | B．a; 不填 | C．the; the | D．the; a |
On Teacher’s Day, we all went to school to see our teachers．
| A．especially | B．specially | C．particularly | D．attentively |