1.His _____ _____(英语口语)is poor.He can't ______ ________ _______ ______ (使发音正确)
2.Do you know ______ ________ ______ (如何使用)commas?
3.If you can't _______ _______ (处理)the problem well,you may_____ _____(产生分歧)
4.We must ______ them_______ _______ (把...视为挑战)
5.My sister is ______ ______ ______ _______(不敢出去) at night