—I'm not sure what to write aboutThe Secret Gardenin the report.
—You should read some _____ about the book before writing.
reviews
reasons
results
rewards
—Mum,it's too hot. _____ I swim in the lake?
—No,you _____. That's too dangerous.
Should; can't
Need; mustn't
Must; needn't
Could; mustn't
I _____ go now,or I'll miss my train.
can
might
must
could