If _____ carefully, the experiment will be successful

ther’s purse, _______ he put ￥1,000, was missing on the bus.

It was April 29,2011 ________ Prince William and Kate Middleton walked into the palace hall of the wedding ceremony.[ ]

Has Mary ever visited Tower Bridge—Yes. She ______ it two years ago.

When I came out of the bank,I found my bike _______in broad daylight[ ]