The author used to be a doctor but later gave up the ______ of medicine for full-time writing.
Thank you for the great trouble you ______to find us the right person for the job.
–Could I borrow your computer? --_______.
It’s quite obvious that the aging population in China will cause _____heavy pressure on _____whole society in the future.
—Next Monday is my birthday. —Is that so? ________
On July 1st, 1921, the red boat on South Lake in Jiaxing ________ the birth of the Communist Party of China, which marked a new start for Chinese people.