1 He is able to swim __the river 1over 2.above 3across 4 throught
问题描述：
1 He is able to swim __the river 1over 2.above 3across 4 throught
2 The boat is passing __the bridge
1 under 2through 3across 4over
3the sunlight came__the widows
1out of 2 through 3over 4above
需要原因,
答
over ,above 是指在上方,across 在从一边到另一边,through 是指在里面通过.所以1.across 游过河.2.under 在桥下面通过 3.through 穿过窗户