淋巴液来自（）.
A.组织液
B.血液
C.细胞内液
D.脑脊液
参考答案：A
社会自我基本成熟的时期为( )
A．青年期
B．幼儿期
C．童年期
D．少年期
—Why aren’t they here yet?
—They the bus.
A．can have missed
B．must be late for
C．may have missed
D．might be late for
