You’d better look up the new word in a dictionary _____ you don’t know it ?
My aunt would rather __________a bus _________ride a bike.
They don’t seem __________who ________for help.
.Your son has kept _________ for two hours. You’d better ask him to have a rest.
A ____________person treats everyone____________.
At least 300 million people are using QQ_____ by Ma Huateng to chat online.