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I was astounded at his---- lack of knowledge about the continent of Africa.

I was astounded at his---- lack of knowledge about the continent of Africa.

I was astounded at his---- lack of knowledge about the continent of Africa.

I was astounded at his---- lack of knowledge about the continent of Africa.

I was astounded at his---- lack of knowledge about the continent of Africa.

I was astounded at his---- lack of knowledge about the continent of Africa.

I was astounded at his---- lack of knowledge about the continent of Africa.

I was astounded at his---- lack of knowledge about the continent of Africa.

I was astounded at his---- lack of knowledge about the continent of Africa.

I was astounded at his---- lack of knowledge about the continent of Africa.

I was astounded at his---- lack of knowledge about the continent of Africa.

I was astounded at his---- lack of knowledge about the continent of Africa.

I was astounded at his---- lack of knowledge about the continent of Africa.

I was astounded at his---- lack of knowledge about the continent of Africa.

I was astounded at his---- lack of knowledge about the continent of Africa.

I was astounded at his---- lack of knowledge about the continent of Africa.

I was astounded at his---- lack of knowledge about the continent of Africa.

I was astounded at his---- lack of knowledge about the continent of Africa.

I was astounded at his---- lack of knowledge about the continent of Africa.

I was astounded at his---- lack of knowledge about the continent of Africa.

I was astounded at his---- lack of knowledge about the continent of Africa.

I was astounded at his---- lack of knowledge about the continent of Africa.

I was astounded at his---- lack of knowledge about the continent of Africa.

I was astounded at his---- lack of knowledge about the continent of Africa.

I was astounded at his---- lack of knowledge about the continent of Africa.

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I was astounded at his---- lack of knowledge about the continent of Africa.

I was astounded at his---- lack of knowledge about the continent of Africa.

I was astounded at his---- lack of knowledge about the continent of Africa.