They had received no news of him since his ____ (离开) from the island.
下列数据中最接近实际的是（ ）
If you buy ________ MP4 player in our store, you can get a watch for ________ free.
下列加线字词和用法完全相同的一项是( )
如果方程 12 （x+6）=2 与方程 a（x+3）= 12 a﹣ 13 x 的解相同，求 a 的值．
