Question

【题目】Scientists have managed _________ robots walk and dance easily.
A.to make
B.making
C.makes
D.to making

Answer 1

【答案】A
【解析】句意：科学家已经可以很容易的设法制造出会走路和会跳舞的机器人。Manage to do sth.根据句意，所以答案是A。