I would rather________Professor Smith and I would rather you________for him at once. 

I lost my way in complete darkness and, ______ matters worse, it began to rain.

 Our waste recycling project ________ a lot of investigation and paperwork had been done by the end of last term.

Underground railway is being built in Shenyang. We are sure to take the subway to ______ in the city in no time.

 Under the environment of fierce competition, the only way John could imagine ________ stress was to get tougher by making greater efforts.