The teacher asked the students to hand in their papers when they( )the test.
A.正确答案Ahad finished
B.would finish
C.would have finished
D.were finishing
The teacher asked the students to hand in their papers when they( )the test.
The teacher asked the students to hand in their papers when they( )the test.
A.正确答案Ahad finished
B.would finish
C.would have finished
D.were finishing