根据首字母及汉语提示，完成下列单词的拼写，使句意明确，语言通顺。

小题1:Sorry, I can’t follow you. Would you please speak more             (缓慢地)?

小题2:Bob was very careless. He made so many           (错误)  that he failed the exam.

小题3:Reading English aloud every day will of course help you to improve your       (发音).

小题4:I had no chance to r            (回答) to his question.

小题5:Tony is always friendly and h            （有帮助的） to others.

今年是中国加入世界贸易组织10周年。下列关于世界贸易组织的表述中，正确的是（）

①它是最重要的国际性贸易组织

②透明度原则是其最重要的原则

③消减关税是其主要目标之一

④它促进了发展中国家的对外贸易

A.①②④

B.①③④

C.②③④

D.①②③