Look at the ten statements for this part. You will hear a man talking about "The Wright Brothers ". Decide whether you think each statement is right(R), wrong(W)or not mentioned(NM). Not all tests of the 50-pound glider were successful.

The Wright Brothers spent a lot of time observing flyin...

单项选择题The Wright Brothers spent a lot of time observing flying birds.

The case of the driver indicates that______.A．you’d bet...

单项选择题The case of the driver indicates that______.

The Wrights found the air flowing in wings enabled bird...

单项选择题The Wrights found the air flowing in wings enabled birds to fly.