Thebackpack            beLinda’s.It        beGrace’s.Is...

問題詳情：

The backpack             be Linda’s. It         be Grace’s. I saw it at her home before.

A. mustn’t, must      B. can’t, must        C. may not, can     D. could, might

【回答】

B

知識點：情態動詞

題型：選擇題