How was your recent trip to Sichuan?—I’ve never had_______ one before.

They are just college graduates and don’t realize _____ to start and run a company.

Although Little Binging got a very serious illness, people didn’t ___________ this poor baby and tried their best to save him.

Let’s start the trip ______ half past eight ______ the morning of February 21.[ ]

I find hard to get on with him.