99色精品-9色在线-99色在线-99色视频国产欧美日产一区二区三区_亚洲精品亚洲人成在线观看_四虎在线精品永久观看_免费一级a一片久久精

<dd id="uymr2"></dd><ruby id="uymr2"><output id="uymr2"></output></ruby>

<dl id="uymr2"></dl>

<ins id="uymr2"></ins>

<pre id="uymr2"><acronym id="uymr2"></acronym></pre>

<pre id="uymr2"><legend id="uymr2"></legend></pre>

<pre id="uymr2"><strong id="uymr2"></strong></pre>

單項(xiàng)選擇題

The signals that will be used for emergency should be clearly （）.

A. set out
B. set off
C. get off
D. cut off

你可能感興趣的試題

單項(xiàng)選擇題

The fire drill is （）. You are dismissed.

A.finish
B.finished
C.begin
D.beginning

單項(xiàng)選擇題

Lower the （）ladder.

A.embark
B.embarkation
C.disembark
D.B+C