What do you think of Mike?-A nice boy! __________ a monitor, he not only studies hard but also likes helping his classmates.[ ]

Thousands of years ago people discovered the phenomenon by chance, and this was _____ the idea of the compass first came from.

Wow, your new bicycle looks the same as_________.—Really?

Why not upstairs and have a look?

After playing football about half an hour, the students took _________ rest.