The genes of the cloned animals are so arranged that it can't ______ such a disease, so it soon died.
Jeanne said; “My friend, Mathilde, __ very hard during those years.”
I don’t go in for sports, but I enjoy ___ basketball matches.
Mr. Smith insists on doing some running even __ a cold morning.
I had hoped Mr.Blake ___ earlier than usual.
Ruth has been married ___ Steven for ten years but she does not know her husband is a door-keeper.