I’m 14. Li Lei is 15. I’m _____ than Li Lei.
The family sent clothes to the homeless and made them ______ warm in winter.
A lot of trees ______ in the country every year.
_____ he is only 4 years old,he is able to play the piano very well.
Working hard ________ the key _________ success of everything.
We feel like ___________ the work as soon as possible.