There is always room for improvement( )much you have already done.

[单选题]You should be ashamed ________ what you have done.A.to B.of C.by D.at

[单选题]Please keep a detailed _____of the work that you have done.A.paperB.ideaC.e

Whether you are someone who smiles a lot（1） ____ not， there is always room for i

But already people have made great discoveries and have done exciting things. Th

You cant go out ________ your homework is being done.A. untilB. sinceC. beforeD.

[单选题]Well done and _________.- Thank you very much!A.not at all.B.congratulation

[主观题]What have you done to stay current in your field?

[主观题]Of all the work you have done, where have you been the most successful对于你所做过的所有工作，你认为哪项工作你做得最成功？

You have done us _____ great service.A. aB. the; aC. /;D. the; /

More time _____, we should have done the job much better.A. to giveB. giveC. bei