The computer is much too expensive. I'll _____it.          [ ]

A. think about            

B. think over          

C. talk about            

D. say about

If you have to jump in the water when abandoning a vessel，your legs should be（）.

A.spread apart as far as possible

B.held as tightly against your chest as possible

C.in a kneeling position

D.extended straight down and crossed at the ankles