If you ________ your attention on the job in hand, you’ll soon finish it.
| A.adapt | B.concentrate | C.apply | D.request | 
—How can I use this washing machine?
 —Well, just the instructions.
| A.belong to | B.refer to | C.agree to | D.point to | 
We are having a class get-together. It’s been twenty years we graduated from high school.
| A.before | B.since | C.after | D.when | 
—I have finished the homework.
 — . How about going out for a walk?
| A.So have I | B.So I have | C.So I do | D.So do I | 
—You seemed not to be interested in the story yesterday.
 —Yes. I it in a magazine before.
| A.read | B.was reading | C.have read | D.had read | 
We should go to school by bus or underground rather than by car global warming.
| A.reducing | B.to reduce | C.reduced | D.having reduced |