用适当的连词填空。
①I'd like to go with you, ____ I'm too busy．
②It was only five minutes'walk from here, ____ we didn't take a taxi．
③ Suddenly he tripped____fell．____ he woke up．
④You can go on foot, ____ you like．It's not far．
⑤I fell off my bike last Saturday,____ hurt my foot．
