1.When the students came into the classroom,the teacher ( ) on the blackboard.A:is writingB:was writingC:wrote2.I have ( )to tell you A:important something B:something important C:something importantly3.The joke kept us ( )A:laughingB:to laughC:laugh at
问题描述：
1.When the students came into the classroom,the teacher ( ) on the blackboard.
A:is writing
B:was writing
C:wrote
2.I have ( )to tell you
A:important something
B:something important
C:something importantly
3.The joke kept us ( )
A:laughing
B:to laugh
C:laugh at
答
1.B
2.B
3.A