What do you guess our friend Bob when we get to his home?
A. does
B. would do
C. has been doing
D. will be doing
网友回答
A. does
B. would do
C. has been doing
(答案→)D. will be doing
解析：
整句的意思是：当我们到他家的时候，你们猜我们的朋友鲍勃在做什么？
既然是猜，这件事就没有发生，因此，应该用将来时态；到家的时刻和做事是同时，所以应该用将来进行时。因此，该选D。