Question

【题目】 -What is the boy standing out of the house for? .

-Because he left his key at home. He can't get in the house his parent comes back.

A. because B. until C. after D. when

Answer 1

【答案】B

【解析】

试题分析：句意：--那个男孩为什么站在房子外面？--因为他把钥匙忘在了家里。直到他的父母回来他才能进入房间。not until，直到……才……。结合句意，故选B。