用所给词的适当形式填空。

1. I have some __________ (favor) to ask you.

2. Tom and I __________ (go) on vacation next week.

3. Do you have __________ (some) money with you?

4. _________ (not forget) to clean the bedroom.

5. He likes to do the __________ (shop) with his sister.

6. It's _________ (relax) to make dinner at home.

7. Could you please __________ (do) the dishes?

PON系统上行传输波长为（）nm。

A、1550

B、1490

C、850

D、1310