You _____ practise the drums while the baby is sleeping. 
#89558
A
needn’t
B
mightn’t
C
mustn’t
D
won’t
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 If you______to her about it yesterday, you ______ what to do now. 
#86633
A
should have spoken; would know
B
spoke; would know
C
had spoken; would have known
D
had spoken; would know