![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
[单选题]
I have__violin and I can play__violin()
A.;a
B.;the
C.;/
D.the;the
![](https://static.youtibao.com/asksite/comm/h5/images/m_q_a.png)
B、;the
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.;a
B.;the
C.;/
D.the;the
B、;the
A.i⁴ⁿ=1,n∈Z
B.i⁴ⁿ⁺¹=i,n∈Z
C.i⁴ⁿ⁺²=-1,n∈Z
D.iⁿ+iⁿ⁺¹+iⁿ⁺²+Iⁿ⁺³=0,n∈Z
E.iⁿiⁿ⁺¹iⁿ⁺²Iⁿ⁺³=1,n∈Z
F.i⁴ⁿ⁺³=-i,n∈Z
______ I'd have told you.
A.If I would have known it
B.If I had have known it
C.Had I known it
D.Should I known it
I'm not really ill, but I have a ______ headache.
A.slight
B.temporary
C.light
D.mild
I had hoped that I ______ the lecture on American Romanticism.
A.attend
B.attending
C.could attend
D.can attend