You can be a good teacher unless you become more patient.
I will go on with the experiment unless my mother _____ me to stop.
____ they are working ! We should learn from them.
–The little boy seldom puts away his toys by himself, does he? -- _____. So his mother has to do it for him.
The tiger is now in danger of disappearing. So more attention ____ to protecting the tiger.
-Would you care for a cup of tea? --Ione. Thank you all the same.