It was not until dark ______ he found ______ hethought was the correct way to solve the problem

Every detail should be thought of _______that nothing unexpected happens again

The place __ the bridge is supposed to be built should be ____the cross-river traffic is the heaviest .

Wow，Beijing was selected as the host city for the 2022 Winter Olympic Games!— ！

In her shows, Oprah has helped thousands of men and women _____ things that bother them in life. [ ]