—Could you tell me the____ of making such tasty cakes? — Well, I just follow the directons in the cookbook.
Last Sunday he made a promise ________ he was free he would take me to Qingdao.
Last Sunday he promised ________ today, but he hasn't appeared yet.
At that time I had no idea ________ I could hand it to him without being seen.
Now there is a danger ________ the ground may fall in under the heavy traffic.
We think it possible ________ the local government will be able to solve the housing problem.