Ответ:

To form questions in the present simple passive, we use the auxiliary verb "is" or "are" (depending on the subject) + the main verb in its past participle form + the subject.

Complete rules for forming present simple passive questions:

• Is Amsterdam organised well for cyclists?

- Auxiliary verb: Is

- Main verb: organised

- Past participle form: organised

- Subject: Amsterdam

• Are bicycles used by teenagers in Amsterdam?

- Auxiliary verb: Are

- Main verb: used

- Past participle form: used

- Subject: bicycles

• When is a safety test given to children?

- Auxiliary verb: Is

- Main verb: given

- Past participle form: given

- Subject: a safety test

- Question word: When

• Why are so many bikes ridden in Amsterdam?

- Auxiliary verb: Are

- Main verb: ridden

- Past participle form: ridden

- Subject: so many bikes

- Question word: Why

So, to form questions in the present simple passive, we use the auxiliary verb "is" or "are" + the main verb in its past participle form + the subject.

To form questions in the present simple passive, we use "is/are" + the past participle of the verb + "by" + the subject.

The completed rules would be:

• Is Amsterdam organized well for cyclists? - Is + Amsterdam + organized (past participle) + well for cyclists?

• Are bicycles used by teenagers in Amsterdam? - Are + bicycles + used (past participle) + by teenagers in Amsterdam?

• When is a safety test given to children? - When + is + a safety test + given (past participle) + to children?

• Why are so many bikes ridden in Amsterdam? - Why + are + so many bikes + ridden (past participle) + in Amsterdam?