根据汉语完成句子

1. 我用了两个小时修车.

    It __________ me two hours __________ __________ the bike.

2. 直到妈妈回来时,他才完成作业.

    He __________ finish his homework __________ his mother came back.

3. 他和我都不是老师.

    __________ he __________ I am a teacher.

4. 他从小就对数学感兴趣.

    He became __________ in maths when he was __________.

5. 你最好乘火车.

    You'd __________ __________ a train.