We are confident that the environmenr by our further efforts to reduce pollution
A.had been improved | B.will be imroved | C.is improved | D.was improved |
It’s____ comfort to know that so many people are donating money and food to the people in need.
A./, the | B.a, the | C.a, / | D./, a |
_________ the project in time, the workers were working at weekends.
A.Completing | B.Having completed | C.To have completed | D.To complete |
. _________ many times, he finally understood it.
A.Told | B.Telling | C.Having told | D.Having been told |
The chairman thought _________ necessary to invite Professor Smith to speak at the meeting.
A.that | B.it | C.this | D.him |
. It was not until nearly a month later _________I received the managers reply.
A.since | B.when | C.as | D.that |