根据汉语提示，完成下列句子。
1．我们不再骑自行车去上学了。
We________go to school by bike________ ________.
2．所有的这些旧自行车都能用，清把它们修好。
Al the old bikes can work. Please________ ________ ________.
3．我们班的学生每年都向学校的贫困生捐款。
The students in our class________some money ________poor students in our school every ________
year.
4．你能很快地做出这些很难的数学题吗？
Can you work________the difficult math problems
5．他看到路上有一个钱包，便停下来捡起它。
He saw a purse lying on the road and________ ________ ________it up?