He ________ have completed his work; otherwise, he wouldn’t be enjoying himself by the seaside.[ ]

It requires ____ your willingness to do thejob It also requires a lot of men­tal effort

_____makes him different is ______he canoffer more information.

Let you and ______ good friends .

In a recent study, some scientists looked at the monkey’s brain activity through a computer system, which changed the brain __________ into digital motor commands.