题目内容
John waited at the bus stop for nearly an hour ___ the bus finally arrived.
A. when B. as C. before D. while
C
练习册系列答案
相关题目
John waited until he got back his breath and could speak .
| A．normally | B．commonly | C．regularly | D．formally |
John waited until he got back his breath and could speak .
|
A．normally |
B．commonly |
C．regularly |
D．formally |