The teacher, together with his five students, _______ a new experiment ___________ the office.
A: is doing; in
B: are doing; in
C: are doing; on
D: is doing; on
A: is doing; in
B: are doing; in
C: are doing; on
D: is doing; on
举一反三
- He was busy ____ his homework. A: doing B: to do C: that he was doing D: he was doing
- Can you imagine _________? A: what his doing B: What is he doing C: what he is doing D: he is doing what
- Professor Li _______ in doing his experiment for nearly ten years.
- All her time __( )___ experiment, she has no time for films. A: devoted to do B: devoted to doing C: devoting to doing D: is devoted to doing
- If ______, the experiment will be successful. A: carefully doing B: B. it done carefully C: carefully done D: D. doing carefully