―Look at the lady there. ______ it be Mrs. Green―No, it _______ be her. She left for London this morning.

technique ____, the production as awhole increased by % percent last year

_______to strong sunlight for a long time will do harm to our skin. [ ]

Our teacher recommended _ more books in the school library.

The number of people present at the meeting_________about 1000 , a large number of whom _______ experts from abroad.