Doctor Green went on with his experiment on human being ________ the debate going on around him.

A) worth

B) worthy

C) worthwhile

D) worthless

A) very much slower

B) so much slower

C) too much slower

D) much more slower

A) give off

B) give up

C) give in

D) give out

A) forgot

B) put

C) left

D) set

A) spoke

B) speaks

C) speak

D) speaking

A) must

B) can

C) may

D) will

A) with

B) in

C) on

D) for

A) won't have known

B) can't have known

C) shouldn't know

D) mustn't know

A) nor shall I

B) neither can I

C) so do I

D) so I can

A) food

B) dinner

C) lunch

D) meal