翻译

1. 上学期你儿子在英语方面取得了很大的进步.

    Your son _____ great ______ ______ his English last term.

2. 不知道你是否能帮我的忙.

    I _____ _____ you would mind ______ me.

3. 无论这道题有多难,我们都能解出它.

    _______ ______ ______ difficult the problem may be, we will work it out.

   It is normal for us to ______ some ______ ______ studies.

5. 那就是我在寻找的钥匙.

   That's the key ______ ______ ______ for.