问题
选择题
.He suddenly saw what looked like a snake in the darkness. For an instant his heart seemed to stop ______.
A．to beat
B．beating
C．beaten
D．being beaten
答案
答案：B
本题考查动词用法。Stop doing停止做，stop to do停下来做。句意：他突然在黑暗中看到像蛇的东西，瞬间他的心脏好像停止跳动了。