(2019原创)There are so many foggy days these days. We all want to find out________.

A.what we did to prevent it B.what we can do to prevent it

C.why we did to prevent it D.why we do to prevent it

- What beautiful photos! Can you tell me _?

- I took them in the Summer Palace.

A.where you took them B.where you will take them

C.where did you take them D.where will you take them

(2019原创)Peter says that the Whites are on holiday, but no one knows________.

A.when they have gone B.when have they gone

C.when they went D.when do they go

(2019原创)They want to go on a trip by train, but still can't decide________.

A.how they're going B.where they're going

C.why they're planning D.when they're planning

(2019原创)These little children don't know ________. They need to ask their mothers for help.

A.what their shoes are B.where are their shoes

C.how their shoes can be put on D.when they lost their shoes

(2018唐山路南区一模)My English is poor. I really don't know________.

A.where I can improve my English quickly B.how I can improve my English quickly

C.why I can learn English quickly D.when I can learn English quickly

(2018唐山古治区二模)She sent a nice skirt to her mom as a birthday present. Do you know ________?

A.which she bought B.which she will buy

C.where she bought it D.where she will buy it

(2017南京改编)—Did Alice tell you ________ to the station?

—Yes, she said we would meet there at ten.

A.how to get B.what to get

C.when to get D.where to get

(2017唐山乐亭县一模)Can you show me ________ the car? I have no idea about it.

A.how to park B.when to park

C.why to park D.what to park

---Could you tell me ______?

---Oh， no. The place is a secret before we get there.

A.when we will start B.where we will go

C.when will we start D.where will we go