单项选择题
We have missed the last bus. It means（）to walk over the mountain.
A.to have B.having C.must D.might
单项选择题 You'd better have your TV set（）.
单项选择题 Look! The boy （）a model ship and he （） it in the lake now.
单项选择题 （）in the open air has given you a good color.
