We ___ need more sugar already - I only bought some last week.
The key suggests can't should be used in question NO.4, but it doesn't make sense to me.
I wonder if the key goes wrong? I may just say don't.
And what does it mean if can't is used here?
Anyone can help?
Complete the following sentences using an appropriate modal verb.
- All children under 12 ______ be accompanied by an adult.
- There's a free 30-day trial period, so you ______ pay anything for the first month.
- I missed the last train and ______ get a taxi home.
- We ______ need more sugar already — I only bought some last week.