My friend Jack was the first person I knew ______an iPhone 5S.
Don’t trust such people _____ praise you to your face but speak ill of you behind your back.
– I met Jackson at our school theatre. Can you imagine_____ well-known _____ an expert on ENT?
It is uncertain ___ side effects these weight-loss drugs will bring about, although hundreds of thousands of patients have taken it.
On the celebration of the university’s 100th birthday, he said, “I have never experienced __________ time here as a graduate of Tsinghua University.”
Only when to explain thereasonfor this.