问题补充:
---Is that Jack speaking?
---Sorry, he in. He back in half an hour.
A. isn’t; will be
B. wasn’t; will
C. isn’t; is
D. wasn’t; was
答案:
(答案→)A. isn’t; will be
B. wasn’t; will
C. isn’t; is
D. wasn’t; was
解析:电话用语根据句意可知Jack不在家,半个小时后回来,不在家be not in+一段时间表示多久之后,常用到将来时中