__________there are only 20 minutes left
题型：选择题
问题：
__________there are only 20 minutes left before the train left，I felt uneasy in the taxi to the railway station.
A．That
B．When
C．Which
D．Because
__________there are only 20 minutes left before the train left，I felt uneasy in the taxi to the railway station.
A．That
B．When
C．Which
D．Because