Having won the first place in the English examination, Tom ran back home,       .

I’m worn out,____,the bike doesn’t work well,___ I can’t go further.

(2013·沈阳二中模拟)She devoted herself________to her research and it earned her a good reputation in her field.

Let your child learn to be independent, for _____ he will leave home to lead his own life as a fully independent adult.

The monitor said that the learning method he used         improved his maths.