Question

You won’t feel happy at school ______ you get on well with your classmates.

A．though

B．when

C．unless

D．because

Answer 1

C

词义辨析。though 尽管；when当……时候；unless如果不；because因为。句意：在学校里如果你不能和同学们相处融洽，你就不会感到快乐。所以选C。