While typing, Helen has a habit of stopping _____ to give her long and flowing hair a smooth.
When he got off the bus, he found his pocket ______.
------ Look, where are you going ? ------ Oh, I’m terribly sorry. ______.
11. ______ she is young, she knows quite a lot.
It is really hot ______ January in Xi’an now. Better take off your coat.
___________, a form must be filled in.