________ on the subject for half an hour, Liu Ying suddenly stopped.
A. To be worked B. To work
C. Having worked D. Having been worked
She offered me practical ________ with my research, for which I would appreciate for my whole life.
A. conduct B. certificate C. admiration D. assistance
“ Look at him! He behaved ________ nothing had happened”, said Mary.
A. as if B. even if C. if D. unless
They were singing and dancing to ________ their high spirits though it was very cold.
A. keep up B. build up C. bring up D. pick up
The weather is so ________ this year that we can hardly stand so many cold days!
A. wonderful B. awful C. absurd D. accessible
The place ________ the bridge is supposed to be built should be________the cross-river traffic is the heaviest.
A. which; where B. where; which
C. where; where D. which; which
