_______ astonishes us is that AlphaGo defeated the human champion.

Where is the man ____ I met thismorning

I will not wait for him for a second-he may have something else to do, so he could not ________ here.[ ]

I’ve studied growing plants as one of myinterests.Could I make some suggestions—_______.

To our surprise, we got ______ people to attend the meeting as we had expected.