A.certain
B.sure
C.real
D.very
第1题:
A.While
B.As soon as
C.As
D.Once
第2题:
[A] so [B] once [C] as [D] where
第3题:
第4题:
It seemed as if all of a ______the animal had smelt danger in the air.
A、sudden
B、moment
C、minute
D、once
第5题:
______ do we go for picnics.
A. Certainly
B. Seldom
C. Sometimes
D. Once
第6题: