What’s ______ most useful invention in the 20th century? —______ computer, I think.

I prefer buying her some presents ______ her some money. [ ]

What about going hiking this weekend?—Sounds good. The weather is _____.

Deng Yaping was born _____ June 2nd, 1973.[ ]

When he arrived at the gate, he found a wallet _____ on the ground.