One of the glorious moments in my school life was I was awarded the Mayor’s Award．
A．why B．how C．that D．when
We saw ____ audience clapping their hands when ______ popular singer appeared on the stage．
A．the; the B．the; 不填 C．an; a D．不填; the
After a long absence, I went back to college, ______ to pick up where I'd left off．
A．hoping B．hope C．to hope D．hoped
No matter how ______，scientists are eager to know more about it by exploring.
A. an ocean may be deep B. deep may an ocean be
C. deep an ocean may be D. may an ocean be deep
The parking rules in public places should be ______ strictly， otherwise you will get a ticket.
A. realized B, recognized C. consulted D. observed
— Tony, are you listening to me?
—Sorry, Sir. I ______ to figure out what you said just now.
A. was trying B. have tried C. tried D. had tried
