—Is there any possible way to help them get rid of such a bad habit?—To tell the truth, it’s very hard. But we ________ on this problem, trying to improve the situation .
See what you have done! Don’t you have a ______ of right or wrong?
I got ______ bad toothache yesterday, which kept me awake ______ whole night.
Greenhouse phenomena would cause ______ rise in sea levels worldwide and change ______ weather on the earth.
He left ______ with my secretary that he would call again in the afternoon. He said he would keep ______.
Shelly prepared carefully for her English examination so that she could be sure of passing it at her first ______.