问题
Polly’s mother was anxious about ______ she could get home safely in ______ foggy a day.
A:whether; that
B:if; that
C:whether; such
D:if; so
B:if; that
C:whether; such
D:if; so
正确答案是：
同类题型
I once lived in a house _______ roof has fallen in.
Which is the biggest number of the four?—．
Do you know the boy ___ is standing under the tree?– Yes, he is my friend, Peter.
___________ his birthday, he usually has a party.[ ]
Do you know ________ tall girl in purple?–Sure. That’s Kate. She is an old friend of mine.