He speak English very well although he has studied it for only one year.
A:mustn't
B:can't
C:must
D:can
1972年,尼克松总统访华,两国在上海签署了《上海公报》。这意味着( )
某程序框图如图所示,该程序运行后输出的n值是8,则S0值为下列各值中的( )
在家庭中,我们与父母之间发生矛盾时,首先需要( )