【2012 贵州六盘水】The man was so tired,___ he still went on working.
It ______ forty-five minutes ______ there by bus.
---- why not swim in the river?---oh, no. our teacher told us _____ here. It’s dangerous.
I can’t swim. And she can’t, _______.
I was doing my homework _______ a dog came in.
—Mary can’t help ___the house. Why? —Because she is busy ____a hotel reservation.