idn’t go to Europe, why—I _____ this morning, but I _____ toShanghai because of an emergency .

I could have offered you some help last weekend, but I _______ with my work at that time

n’t believe John won the first prize at the speech competition, ______

may have missed her train, in _______ case shewon’t arrive for another hour

The flowers ______ my mother, but my sister thought they were for her and took them.