日韩欧美亚洲 _ 欧美亚洲一区 _ 日本亚洲欧美 _ 亚洲精品欧美国产白袜脚足J棉袜在线观看_亚洲熟妇av一区二区三区_久久天天躁狠狠躁夜_精品众筹模特私拍在线

單項選擇題

Fire drill is carried out once a （）.

A.year
B.day
C.week
D.month

你可能感興趣的試題

單項選擇題

Any emergency pump situated （）machinery space should also be started.

A.outside
B.under
C.beside
D.besides

單項選擇題

On hearing the fire signal, the crew should proceed immediately to （）their assigned duties.

A. carry on
B. put out
C. carry out
D. take off