She looks very happy. She ______ have passed the exam.—I guess so. It’s not difficult after all.

________ girl in a red skirt is my friend. She has ________ iphone 6s in her hand.

Lots of rescue workers were working around the clock, _____ supplies to Yushu, Qinghai Province after the earthquake. [ ]

Is this key ________–No, it isn’t. It’s ___________.

We had to finish the work .So we decided _____.