<?xml version="1.0"?>
<!DOCTYPE BATCH SYSTEM "exercises_oup.dtd"><batch>
<exercise subhead="dragdrop"/>
<media type="none"/><head><title>Sentence Match</title><task>Type in the word missing from the sentences.</task></head>
<body findword="embryo">
<item><text>the cells of an early ______</text></item>
<item><text>frozen ______s stored at a fertility clinic</text></item>
<item><text>The couple has produced three ______s for implantation.</text></item>
<item><text>Two or three ______s are implanted into the woman's body.</text></item>
<item><text>the current debate over cloning human ______s</text></item>
</body>
</batch>

