根据句意和所给首字母填写单词.
1.I can't understand s____ English.
2.We often make m___ in grammar.
3.You will find English important l___ on.
4.It's not good to l___ at others.
5.Who knows the s___ of becoming a good language learner?
6.They often go out with English-s___ friends.
7.d___ with no or very little light
8.t___ go from place to place
9.w___ go on foot but not run