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請根據(jù)要求改寫下列句子，每空一詞。

1.Her father has been on the phone since half an hour ago. （對劃線部分提問）

_________ _________ has her father been on the phone?

2.I think diving is the most difficult activity of all. （保持句意基本不變）

I think diving is more difficult than __________ __________ activity.

3.We can put those machines on the ground floor of the building. （改為被動語態(tài)）

Those machines can __________ __________on the ground floor of the building.

4.The beach is a nice place for tourists.  （改為感嘆句）

___________ __________ nice place for tourists the beach is!

5.Pingping is so energetic that he can be a good monitor. （改為簡單句）

Pingping is ___________ ___________ to be a good monitor.

請根據(jù)要求改寫下列句子，每空一詞。
【小題1】Her father has been on the phone since half an hour ago. （對劃線部分提問）
_________ _________ has her father been on the phone?
【小題2】I think diving is the most difficult activity of all. （保持句意基本不變）
I think diving is more difficult than __________ __________ activity.
【小題3】We can put those machines on the ground floor of the building. （改為被動語態(tài)）
Those machines can __________ __________on the ground floor of the building.
【小題4】The beach is a nice place for tourists.  （改為感嘆句）
___________ __________ nice place for tourists the beach is!
【小題5】Pingping is so energetic that he can be a good monitor. （改為簡單句）
Pingping is ___________ ___________ to be a good monitor.

Her father has been teaching in this school________.

A. since ten years  B. ten years ago C. for ten years D. ten years before