Here I can only give you some purely ___ views of how we can control the situation.

The research lacks  evidence, and therefore, its conclusions are doubtful.

（大连市高三双基测试卷) Jiuzhai Valley is far from big cities. _______, it attracts people from all over the country for its beautiful scenery.

The ___ look on his face showed that he hadn’t expected it .

He tried to tell himself to keep calm instead of being angry. It is________