It has escaped me we stopped in the last class.Tom,would you tell me so that I can go on with my lecture?
She devoted herself ______ to her research and it earned her agood reputation in her field.
The committee is discussing the problem right now. It will_____ have been solved by the end of next week.
一Have you handed in your schoolwork yet?一Yes,I have.I guess it _____ now.
Being a parent is not always easy, and being the parent of a child with special needs often carries with ___ extra stress.
____ twice, the postman refused to deliver our letters unless we changed our dog