97免费在线观看视频,亚洲综合自拍网,黄色毛片免费观看,热久久综合网,免费看日产一区二区三区狠狠操av,久久久涩涩涩,在线精品免费视频,人人插天天干,久久91精品国产91久久

<blockquote id="t9jjx"><acronym id="t9jjx"></acronym></blockquote>

<ruby id="t9jjx"></ruby>

<ruby id="t9jjx"><small id="t9jjx"><sup id="t9jjx"></sup></small></ruby>

單項(xiàng)選擇題

If you（）bright sunlight（）dry wood with a glass, it will start burning.

A.expose；to
B.concentrate；on
C.aim；at
D.focus；on

你可能感興趣的試題

單項(xiàng)選擇題

When he was a young boy, a serious disease deprived him of the（）of hearing.

A.organ
B.possession
C.conduct
D.faculty

單項(xiàng)選擇題

Stamping on any country's national flag is an（）to its people.

A.inflation
B.ingredient
C.insult
D.invasion