2019年mpacc考试英语真题——连词371

{01}I was reading attentively in my own room _____ suddenly he knocked at the door.
A.when
B.while
C.then
D.as
解析：
本题选A。

{02}He _____ along the seaside _____ a tsunami came.
A.walked; when
B.is walking; as
C.was walking; when
D.was walking; while
解析：
本题选C。