Scientists say it may be five or six years ____ it is possible to test this medicine on human patients.
. He left ___ with my secretary that he would call again in the afternoon. He said he would keep ___.
____ is a well-known man.
—Does he work hard at his lessons? —Yes, he __ no efforts, I dare say.
—You ____ have a new dress for your birthday, Mary. —Thank you, mum.
My cousin, little Tom, is __________ a fool. He did very well in all his subjects.