[单选题]
I don’t know why _______ late for class.
A、you are
B、are you
C、are you being
D、being you are

[单选题]
红细胞的内环境是指 （　　）
A、细胞内液
B、细胞外液
C、细胞外液和细胞内液
D、组织液
E、血浆

[单选题]
下列关于男性生殖器的叙述，错误的是（　　）
A、分为内生殖器和外生殖器两部分
B、内生殖器都位于盆腔内
C、外生殖器都显露于体表
D、尿道属于输精管道
E、男性附属腺体分泌物的功能与第二性征的发育无关

[单选题]
《寡人之于国也》中的“五十步笑百步”用的是哪种修辞方法（　　）
A、象征
B、比拟
C、比喻
D、夸张

[单选题]
He________studied, yet he passed every exam．
A、frequently
B、little
C、regularly
D、rarely

[单选题]
_________，I should not have wasted my time trying to explaiil matters to you．
A、I had not realized what you intendec
B、Had I not realized what you intended
C、I had realized what you intended
D、Had I realized what you intended