14. Latest scientific experiments have shown that passive smoking is very harmful to children's health; __ half of the children in England live in homes where at least one adult is a smoker. A) otherwise B) moreover C) however D) thus E) that is

## Step 1<br />The problem is a reading comprehension question that tests the understanding of the relationship between two sentences. The first sentence states that passive smoking is harmful to children's health, and the second sentence provides additional information that half of the children in England live in homes where at least one adult is a smoker.<br /><br />## Step 2<br />The task is to choose the correct conjunction that can connect these two sentences. The conjunction should indicate that the second sentence is adding more information to the first sentence.<br /><br />## Step 3<br />Looking at the options, we can eliminate 'otherwise', 'however', 'thus', and 'that is'. 'Otherwise' is used to indicate an alternative or a different situation, 'however' is used to show contrast, 'thus' is used to show a result or consequence, and 'that is' is used to clarify or explain something.<br /><br />## Step 4<br />The conjunction 'oreover' is used to add more information to a previous statement, which is exactly what we need in this case. The second sentence is adding more information to the first sentence, so 'oreover' is the correct choice.