Please use your best discretion to _______ the matter

64Try your best ________ you’ll certainly succeed this time

When you make a public speech, try your best to make yourself clearly ________

I suppose youre not serious, ____________

Please quote us your best price CIF Lagos, __________ the earliest date of shipment

10． —What’ s your_________?—It's cindyjones@163．com．

17．_________they may not succeed，they will try their best．

Why not________your teacher for help when you can’t finish ________it by yourself?

14． —Is this your bike，David?—No， It’s not________．It's Helen’s．

— Your name again, please. ______. —It's Bell Green.

— Your name again, please. ____________.
—It's Bell Green.

— Show me your permit, please.
   —Oh, it's not in my pocket. It _________.( )