﹣Look! It ________ be David in the classroom.
﹣It ________ be him. Because I saw him in the library a moment ago.( )
may; mustn't
must; can't
can; can't
can; mustn't
﹣﹣﹣What's twenty and fifty?
﹣﹣﹣It's ____________________.( )
fifty
seventy
eighty
ninety
If the weather is nice,we could have a( n)___________ in the park.( )
picnic
chance
place
idea
Jim started to play ___________ violin when he was five.( )
a
an
the
/
单词辨音( )
chair
su ch
mu ch
s chool
both
la b
com b
box