Question

【题目】I have to go bed ten o'clock.
A.at; at
B.to; before
C.in; by
D.by; at

Answer 1

【答案】B
【解析】第一个空 go to bed 意思是“上床睡觉”，第二个空指“在10点以前”用介词 before，故选B。句意是：我不得不在十点以前上床睡觉。