几道英语单选题目
1.The firm was successfully run and _________ ,he owed his success to the support of his friends.
A.looking back
B.looked back
C.to look back
D.when looked back
2.____ was expeced,he broke his promise once more ____ left his friends down.
A.It; which
B.As;which
C.It;as
D.Which;which
3.______ she is not so cheerful ____she used to be?
A.How is it that ;as
B.Why is it that;what
C.Is it why;that
D.How it is that ;as
为什么是这样的？