1she( to wonder) when he (to be back) from new zealand.
2he (to be) to canada before he (to visit) london?
3it (to be) three years shannon (to try) to find a subject for research.
4 it was a very difficult task. i (to understand) it when i (to read) it several times.
5he( to leave) for canada before his family moved to this city and (to live) there since then.
6. as she (not to know)
what kind of present to give him, she (to ask) her friend for advice.
7what he (to do) when you (to call on) him?
8she (to have) that unknown disease since she (to be) 15 years old.
9 yesterday when i (to walk) along the street i met a friend of mine whom i (not to see) for nearly ten years​

She will be wondered when he will be back from new Zealand

Was he in Canada before he visited London?

It had been three years Channon was trying to find a subject for research.

It was a very difficult task. I understood it when I read it several times.

He left for canada before his family moved to this city and have lived there since then.

As she didn't know what kind of present to give him, she asked her friend for advice.

What he was doing when you called him

She has had that unknown disease, since she was 15 years old.

Yesterday when I walked along the street I met a friend of mine whom I haven't seen for nearly ten years.

Объяснение:

Я уверен на 70% в правильности.