根据所给单词的汉语意思，用单词的适当形式填空。
小题1:I suggest you spend less time （聊天）.
小题2:We must take （措施） to prevent environmental pollution from getting worse.
小题3:Her father advised her to keep her （距离） from that fellow.
小题4: （传统的）teaching methods sometimes fail to keep students concentrated.
小题5:I’ve got to apologize for my （行为）. I was out of line.
小题6:Children eat ice cream in the （阴凉）.
小题7:And any （争论） between us would not cause me to lose heart or feel a sense of loss.
小题8:The author （提及）to his teacher twice in his article.
小题9:This book is (计划) for beginners.
小题10:The professor will （发表；递送）a speech at the meeting.