—I’ll be travelling back from London so I can’t come to your party on Friday.— .Come round for a drink next week!
Maria has to baby-sit. That’s______ she can't come with us.
--- I rang you at about ten, but there was no reply.--- Oh, that was probably ____ I was seeing the doctor.
15. _______ all the inventions have in common is _____they have succeeded.A. What; what B. That; that C. What; that D That; what
This old computer must have been of great use to _______ did the scientific research.
--- Do you know _____ Mr. Black’s address is. --- He may live at No. 18 or No. 19 of Bridge Street. I'm not sure of _____.