All passengers ____, please fasten your seat belts and remain seated ____the plane is landing．
A．on board; until B．abroad; since C．on the board; before D．aboard; when
He ____ busy then; otherwise, I believe, he would have given you a hand．
A．had been B．were C．must be D．was
It is not like Mr．Smith, who is a gentleman, _____his wife so rudely．
A．to treat B．treating C．should treat D．treated
As the saying _______, _______ who laughs last laughs best．
A．says; who B．goes; he C．goes; who D．puts; one
An increasing number of people enjoy sun-bathing, but experts warn that too much ________of the body to strong sunlight is harmful．
A．access B．exposure C．resistance D．touch
----Thank you for the trouble you ______ to fix my computer．
----__________!
A．took; Don’t mention it B．caused; You’re welcome
C．made; With pleasure D．spared; It doesn’t matter
