It was not until dark __________ he found __________he thought was the correct way to solve the problem．

News has been put forward ________ more middle school graduates will be admitted into universities.

Could I speak to ____ is ____ the company, please?

It was the training ______ he had as a young man _____ made him such an excellent speaker.

A fantastic idea occurred to him ________ he could use a plastic bottle, ________ cut off, as a container to grow young plants in.

----It’s thirty years since we last met．
----But I still remember the story, believe it or not, _____ we got lost on a rainy night．

_______ is agreed that the traffic accident was largely ________ the driver’s carelessness.

Do you have any idea ___ is actually going on in the classroom?

The Mekong River Commission has found no evidence               the dams on the upper reaches have an influence on the water flow downstream.

It was in the lab ________was taken charge of by Johnson ________they did the experiment.