According to the rule,used batteries _______ be dropped in the red bin for harmful wastes.( )
must
need
can
may
There’re too many clothes in the shop. I really can’t decide .
--Look! Mum, this pair of gloves worn out. I need a new pair. –OK!
The teacher asked us_______ the question .
-Why are you in such a hurry, Mike? -There_______ an NBA basketball game in ten minutes.
He tried to make himself ________ by his students, but he failed.