A
46．How do you learn English？
47．What does your friend look like？
48．I am flying to Sanya to take a holiday．
49．I think the air will be cleaner in the future．
50．Bob，could you please take out the rubbish？
B
A．Let's go．
B．Sure，Mom．
C．I agree with you．
D．Have a nice trip!
E．By reading aloud．
F．She's of medium height．