I eat rice beef and potatoes.It's delicious.（　　）

A．inB．onC．withD．for

This isn't my dictionary. is over there，on the desk.（　　）

A．HisB．MineC．HersD．Yours

Please be polite and offer your seat to people who need it.（　　）

A．neverB．seldomC．sometimesD．always

I love to listen to rock music I am running.（　　）

A．whileB．afterC．sinceD．until

I saw Bob in the garden.He flowers there. （　　）

A．watersB．has watered

C．is wateringD．was watering