C5a具有的生物学活性是( )A．促C3转化酶形成B．趋化作用C．参与膜攻击单位的

用方框中所给单词的适当形式填空，每词限用一次。

come true,    lucky,  shark,  sleepy,  towards

 
小题1:Take some rest after lunch and you won’t feel ________in the afternoon.
小题2:When the child saw her parents waiting at the school gate, she ran ________ them.
小题3:After years of planning, my dream of the European tour ________ last month .
小题4:To protect________, scientists suggest the people stop fishing in some parts of the ocean.
小题5:This morning I was two minutes late for the train, but ________, I didn’t miss it as the train was late, too .