The weather here is very cold, _______ in January and February.

      good service, the restaurant offers different kinds of traditional Fujian dishes.

A firm from New Zealand has revealed a set of robotic legs which they claim will soon allow ________ wheelchair-bound people to walk again.

After ten years abroad, he still recognized his old colleagues ________ he set foot in China．

He speaks English well indeed, but of course not___________a native speaker.