一、出题形式

Boldface题俗称：黑体题、黑脸题、BD题、BF题，出题的形式为给考生一段话，把其中一句话、两句话、或半句话加粗变为黑体，问黑体的句子在这段话中发挥什么样的作用，因此Boldface题最准确的中文叫法应该是：句子作用题。如下考题：

Most of Western music since the Renaissance has been based on a seven-note scale known as the diatonic scale, but when did the scale originate? A fragment of a bone flute excavated at a Neanderthal campsite has four holes, which are spaced in exactly the right way for playing the third through sixth notes of a diatonic scale. The entire flute must surely have had more holes, and the flute was made from a bone that was long enough for these additional holes to have allowed a complete diatonic scale to be played. Therefore, the Neanderthals who made the flute probably used a diatonic musical scale.