You’d better look up the new word in a dictionary _____ you don’t know it ?
---I think _______ask Tim for some advice.---_______. Last time when I turned to him, he refused to help.
Which sign can you mostly see in the school library?
---You needn’t get up early, we have changed our plan.--- Really, but I _______ about it.
---Do you prefer _______ to Beijing by air?---I would rather _______ a train.
---Dinner is ready.Help yourself!---Wow! This delicious.Could you please tell me how to cook it?