A:whe
B:if
C:since
D:until
—It was lucky for you to find this before you would lock the door.
豚鼠的毛色是由一对等位基因控制的性状.一对黑色豚鼠生了两只小豚鼠(一只黑,一只白),若这对豚鼠再生两只小豚鼠都为白色的概率( )
Yesterday my father bought me ____ MP5. I like it very much.
— Would you like a glass of milk?
— ________. I'd like only a cup of tea.
下列词语中的划线字,注音全都正确的一组是( )