问题
We were having a meeting _________ suddenly someone knocked at the door.
A:because
B:when
C:as
D:while
B:when
C:as
D:while
正确答案是：
同类题型
Hot tea __________ honey is good ___________ you. [ ]
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This is ny classmate. _ name is Cindy.
A lot of scientists believe that women’s sense of smell is better developed than ____ of men.
How delicious the coffee is!—That’s right. It will taste ______ with milk.