13.You as well _____ right.A.I are B.I

13.You as well _____ right.A.I are B.I
13.You as well _____ right.
A.I are B.I am C.as I am D.as I are
　14.All but Dick _____ in Class Three this term.
A.are B.is C.were D.was
　15.-Shall I wait here for three hours?
　　　-Yes.Three hours _____ to wait for such a doctor.
A.are not very long for you B.is not long enough for you
C.was not long enough for you D.will be too long for you
　16.Where to get the materials and how to get them _____ at the meeting.
A.have not discussed B.have not been discussed
C.has not discussed D.has not been discussed
　17.I took mathematics and physics because I think that _____ very important for me to make further research in this field.
A.what is B.they are C.this D.which are
　18.Every student and every teacher _____.
A.are going to attend the meeting B.have attended the meeting
C.has attended the meeting D.is attended the meeting