Once out of the earth’s gravity, the astronaut is        by the problem of weightlessness.

A. affected                 B. effected               

     C. related                 D. offered

Once out of the earth’s gravity, the astronaut is____ by the problem of weightlessness.

A. affected                    B. effected                   C. related                 D. offered

 Once out of the earth’s gravity, the astronaut is        by the problem of weightlessness.

A. affected                    B. effected                   C. related                 D. offered

Once out of the earth’s gravity, the astronaut is________ by the problem of weightlessness.

 Once out of the earth’s gravity, the astronaut is        by the problem of weightlessness.

A. affected                    B. effected                   C. related                 D. offered

Once out of the earth’s gravity, the astronaut is _________ by the problem of weightlessness.

1. A.
   affected
2. B.
   inclined
3. C.
   effected
4. D.
   related

Once out of the earth’s gravity, the astronaut is________ by the problem of weightlessness.

Once out of the earth’s gravity, the astronaut is _________ by the problem of weightlessness.

[　　]

There are many problems connect with space travel.  (1)_____ The first and greatest of it is gravity. If you let a pen (2)_____ drop to the floor, you can see gravity in act.(3)_____ Everything is held down the earth by the force of (4)_____ gravity. The weighty of something is another(5)_____ way measuring the amount of force acted on it by gravity.(6)_____ A rocket must go at least 2,500 miles an hour to get(7)_____ away off the gravity of the earth into space.(8)_____   Once out of the earth's gravity, an astronaut is effected(9)____ by still another problem—weightlessness. Here if a pen drop(10)___it does not fall.