________ the convenience of digital payment, many senior citizens started to use smart phones.
A ． To enjoy B ． Enjoying C ． To have enjoyed D ． Enjoy
During the Mid-Autumn Festival, family members often gather together _________ a meal, admire the moon and enjoy moon cakes.
A ． share B ． to share
C ． having shared D ． shared
Peter was so excited _________ he received an invitation from his friend __________Chongqing.
A ． that; to visit B ． when; to visit
C ． that; visiting D ． when; visiting
With a lot of difficult problems ________, the newly-elected president is having a hard time.
A ． settled B ． settling
C ． to settle D ． being settled
The girl came ___________to the bus stop，only ________ the bus had gone.
A ． running; to find B ． to run; to find
C ． and run; found D ． running; finding
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