Parents should take seriously their children's requests for sunglasses ________ eye protection is necessary in sunny weather.

1. A.
   because
2. B.
   though
3. C.
   unless
4. D.
   if

Parents should take seriously their children's requests for sunglasses ____eye protection is necessary in sunny weather.

A because   B. though     C. unless   D. if

Parents should take seriously their children’s requests for sunglasses _______ eye protection is necessary in sunny weather.?

A. because B. through?

C. unless D. if?

Parents should take seriously their children's requests for sunglasses ____eye protection is necessary in sunny weather.

A because   B. though     C. unless   D. if

Parents should take seriously their children's requests for sunglasses________eye protection is necessary in sunny weather.

A．because 　　 B．because of

C．as a result D．thank to