The most promising suggestions are those that will attack the problems that made peop

If the technical problems can be worked out, which method is the most promising？

A．Voiceprints.

B．Fingerprints.

C．Photographs.

D．Signatures.

The president was expected to ______ some suggestions after reading all those reports.

A．come up with

B．put up with

C．catch up with

D．keep up with

One of the most promising methods of storing hydrogen fuel is ______.

A．in gas form

B．putting it in liquid

C．preserving it in tanks

D．in the form. of metal hydrides

One of the most promising methods of storing hydrogen fuel is ______.

A．in gas form

B．putting it in liquid

C．preserving it in tanks

D．in the form. of metal hydrides

The future of spyware is the most promising when it comes to______.

A．standardizing individual online patterns

B．overseeing personal online behaviors

C．diversifying present online patterns

D．regulating various online behaviors

The future of spyware is the most promising when it comes to______.

A．standardizing individual online patterns

B．overseeing personal online behaviors

C．diversifying present online patterns

D．regulating various online behaviors