----Mum, what are you cooking? It smells so _______. ----Oh, cheese cake, of course!I know you enjoy _______ it.
Sometimes Daniel walks for half ________ hour to the zoo.
----What’s your best friend like? -----He_____.
Tom is taller than _____ in his class.
All the students are busy _____ English in the morning.
Lei Feng always _____ others first.