问题补充：
—Hello, can I speak to Robert, please?
—Hold on, please. He in the garage.
A. has worked
B. is working
C. worked
D. will work
答案：
A. has worked
(答案→)B. is working
C. worked
D. will work
解析：“你好，找罗伯特先生接电话好吗？”“等一下他在车库干活。”根据语境可知“他在车库干活”是在打电话时发生的动作而打电话是在现在故选现在进行时，答案为B
