()
A.
B.
C.
D.
参考答案:D
眶底骨折伴有复视者应及时处理,手术必须在2~3周内进行()
34. -Are you sure you have to? It’s been very late.
-I don’t know ________ I can do it if not now.
A.how
B.what
C.when
D.That