问题

Professor Smith, along with his students,_____ on the work day and night[ ]
A: work
B: working
C: is working
D: are working
B: working
C: is working
D: are working
正确答案是:
同类题型
I made a fire ____up the room as soon as myfather came in.
I didn’t have enough money on me,or Ithat iphone on salethe other day
He can__________ walk because it’s raining__________.
What is he going to ______ when he ______ up—He’s going to be a doctor.
______ is no need for primary students to work at their desks all the long