，there must be life on other planets though none has been discovered．
I agree with you．The universe is so large after all．（ ）
A．To my surpriseB．To be honest
C．In my opinionD．Again and again
Oh,the room is too dirty,Tony!
Sorry,Mom．It yesterday．I forgot to do it．（ ）
A．didn't cleanB．isn't cleaned
C．was cleanedD．wasn't cleaned
Where is Catherine？ I haven't seen her for days．
She Wuhan． She'll be back next week．（ ）
A．has gone toB．has been to
C．have gone toD．have been to
I don't know how to____the old books．
Why not give them away to poor children？（ ）
A．hand outB．give upC．deal withD．take up
Mike plays the drums so wonderfully!
Of course． He is than any other students in his class．（ ）
A．talentedB．more talented
C．less talentedD．the most talented
Oh, my God! We have missed the last bus． What shall we do？
I'm afraid that we have no but to take a taxi．（ ）
A．ideaB．decisionC．reasonD．choice