For some time now, world leaders _____ out the necessity for agreement on climate change, the world economy and African development．
A．had been pointing B．have been pointing
C．were pointing D．pointed
Though it is 30 years ____ we last met, I still remember the scene _____ we got separated on a rainy day．
A．before; where B．since; where
C．before; which D．since; when
The fellow left without a word as if ________．
A．never to return B．never returning
C．he had never returned D．he would never be returning
His sacrifices for the country were never officially _____, which made all of us feel discouraged．
A．acknowledged B．appealed C．associated D．approved
What a pity! I missed meeting my friend at the airport because my car was _____ in the traffic jam．
A．broken up B．held up C．kept back D．kept up
--- I'd have made a phone call to you, ___________ your telephone number．
--- That’s all right．What was up then?
A．if I know B．had I forgotten
C．if I hadn’t remembered D．but I forgot
