请根据括号中的中文提示、英文释义或句意，写出句中所缺单词，使句子通顺。
【小题1】We students should do many after-school ____________(活动).
【小题2】People in different countries speak different l_____________.
【小题3】It’s _____________(hard or not easy) for me to play basketball well because I can’t run fast.
【小题4】This boy doesn’t know the ______________(重要性) of study.
【小题5】L___________, he wasn’t badly hurt yesterday.
