29. Like most old cities, Moscow, the capital of Russia, stands on a river. It is wide and ______ and it is called the Moskva River. PEACE

После wide and требуется прилагательное, однородное по значению с описанием реки. Образуется слово peaceful.

Like most old cities, Moscow, the capital of Russia, stands on a river. It is wide and peaceful and it is called the Moskva River.

Ответ: peaceful