Which example is grammatically correct?

What ___ they ___ to you?

What's the opposite of 'optimistic'?

Give this to him, ___ give that to her.

"It's raining cats and dogs." means:

Can this camera ___ good photos?

_____ claims that leaders form unique relationships with followers through social interactions.

A color that is almost gray has a low chroma, or __________.

____ journalism caters to specialized interests of news consumers.

As a service provider, the key element in making your customer interactions successful is____

The valedictorian speech should have ___________ points.