_____________you don’t give up, your dreams will come true.

____ matters most inlearning English is enough practice.

. As there is less and less coal and oil, scientists are exploring new ways of making use of ______ energy, such as sunlight, wind and water for power and fuel.

I think it’s difficult for him _________ English well.

Have you seen the man ______ plan we were talking about ______ yesterday ?