7. Since years ago, leaders for countries in the world ______ out the necessity for the agreement on environment protection.
A. had been pointing B. pointed
C. were pointing D. have been pointing
8. The illegal immigrants were ______ to be screened for sickness.
A. believed B. supposed C. assumed D. imagined
9. Not until the little ailing girl went to bed ______ the ward.
A. the tired mother left B. had the tired mother left
C. the tired mother leaves D. did the tired mother leave
