小题1:I have been to New York.

小题2:We should plant more trees.

小题3:Air pollution is very serious here.

小题4:I’m going to Shanghai by train tomorrow.

小题5:She took part in the long jump last Monday.

题目分析：

小题1:I have been to New York .我去过纽约。

小题2:We should plant more trees. 我们应该多种树。

小题3:Air pollution is very serious here.这里的空气污染很严重。

小题4:I’m going to Shanghai by train tomorrow. 明天我将做火车去上海。

小题5:She took part in the long jump last Monday. 上周一她参加了跳远。