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
The cousins are alike in age, but _____ they are as different as day and night．
A．anyhow B．besides C．otherwise D．moreover
Is it a wonder that _____ little cells can store _____ much energy?
A．such, so B．so, much C．so, so D．such, such
