Question

______ you keep trying till the end, you will never know how strong you are!

A．Although	B．If
C．Unless	D．Because

Answer 1

C

试题分析：. Although尽管； If如果； Unless="if" not如果不；Because因为。句意为：如果你不坚持尝试到最后，你将永远不知道你有多坚强！故选C。