Mountain climbing is one of _______ sports in the world．（ ）
A．dangerousB．more dangerous
C．the most dangerous
Our head teacher is responsible for his work．He spends most of his time with us．
________ He always communicates with our parents in his free time．（ ）
A．I hope so！B．What？
C．That's for sureD．Why？
I haven't seen your English teacher for a week．Where is he？
Sorry，I don't know _______．（ ）
A．where has he beenB．where he has been
C．where has he goneD．where he has gone
I really want to relax myself．Could we see City Danger tonight？
Sure！The actor _______ a hero used to be a schoolteacher．I like him very much．（ ）
A．who playB．which plays
C．who playsD．that play
I'm sorry，Mr Hu．I _______ my English exercise book at home．
It doesn't matter．Please remember ________ it here this afternoon．（ ）
A．forgot；to bringB．left；to take
C．forgot；to takeD．left；to bring
Tom is always careless with his schoolwork．Could you help him？
No problem！I think he _______ to think twice before starting．（ ）
A．should be toldB．shouldn't be told
C．should tell