1.    More than half of older adults still love buying the goods directly at the store, ________ younger consumers like purchasing online.
A. Whereas
B. instead of
C. before
D. so as to
2.    Please write your address clearly to prevent delays _________ filling out the order form. 
A. when
B. for
C. yet
D. therefore
3.    ______________ the dance, Marry said good-bye to her friends. 
A. After leaving
B. Before leaving
C. Before left
D. After left
4.    There are ________ many order for the new products ________ the workers
A. such/ that
B. so/ that
C. too/ to
D. rather/ than
5.    It was ________ a nice song that Maries listened it every day.
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6.    We would like to discuss this problem honestly ________ openly at the next staff meeting.
A. and
B. or
C. nor
D. but