Do you know whose book it is?
Oh. It ______ be Lucy's. Look, her name is on it.( )
can't
must
shouldn't
Learn ________ ,and you will be a successful learner.( )
wisely
lazily
quickly
blindly
Don't you know passengers ________ smoke on high﹣speed trains?( )
needn't
mustn't
wouldn't
couldn't
Our national hero Yue Fei _______ to devote (贡献) himself to the country at a young age.( )
failed
forgot
promised
refused
Your dad has just fallen asleep.Don't wake him up ______ it's really necessary.( )
unless
or
and
but
Cathy always makes good use of her time to study,even _______ her lunch break.( )
around
during
from
between