Cockroaches are many in the house, so she became sick.

英訳のおかしなところを正してください。

その家にはゴキブリが沢山いて彼女は気分が悪くなったそうです。
Cockroaches are many in the house, so she became sick.

答え
manyの使い方がおかしい

There are many cockroaches in the house.

主語+be動詞+manyは不可