Advertising is distinguished from other forms of communication _________ the advertiser pays for the message to be delivered.
That’s the new machine ______ parts are too small to be seen.
—Do you think you could do without help? —______. This is not the first time for me.
Whom would you rather ________ with you, Jim or Jack?
On a rainy day I was riding my bike to pick up my son ___ a terrible accident happened ahead.
— Do you know where Miss Gao is? I couldn’t find her anywhere. — She ________ have gone far, for her coat is still here.