He left ________with my secretary that he would call again in the afternoon and he did keep his ________.

Many football fans attached great importance to the two matches, because China needed to beat Iran to ensure ________ for the Asian Cup semi-finals.

Biology is _____.

. Who would send so many flowers on such an ordinary day? It makes no______.

John has great singing _____________, but to become a real singer, he needs a lot of necessary training and practice.