肉瘿的主要病因是： A．血栓性浅静脉炎 B．血栓性深静脉炎 C．游走性浅静脉炎 D．

用方框中所给单词的适当形式填空，每个单词限用一次。

	turn, fast, shake, science, though

 

 
小题1:It’s very important for us to study         .
小题2:My brother Tony runs         than me.
小题3:In China, we are supposed to         hands when we meet for the first time.
小题4:Last month many people         off their lights for Earth Hour 2012.
小题5:Tina doesn’t give up her dreams         she can’t speak English very well.