Question

词汇运用

catch sight of

1)．_________ his mother, the boy stopped crying．

2)．

She watched the train until it went _________．

3)．I _________(看见)my former teacher just now, but very soon he turned a corner and I _________(看不见)him．

4)．Be sure to _________(照看)your luggage while you’ re at the airport．

Answer 1

答案：
解析：

　　1)．At the sight of

　　2)．out of sight

　　3)．caught sight of　lost sight of

　　4)．keep sight of