Checking your answers before handing in your paper can help you mistakes.
A. make B. provide C. avoid D. advise
— Sir， please put out your cigarette (香烟).
— Sorry. I the sign.
A. don’t notice B. didn’t notice
C. haven’t noticed D. won’t notice
Jim always keeps the tap running he finishes washing his face.
A. since B. while C. as D. till
— Boy， didn’t you see people were waiting in line? Don’t in!
— I am sorry， sir.
A. push B. pull C. put D. carry
I have spent on this job. I think I can finish it this afternoon.
A. sometime; sometime
B. sometimes; some time
C. some time; sometime
D. some times; some time
The of new inventions should be to make life easier， not to make it harder.
A. rules B. subjects
C. secrets D. purposes
