Mother often reminds me that the best thing one can do is to let it rain ______ it is raining.A. unless B when C. even if D. in case
(2012江苏卷)One's life has value one brings value to the life of others.
I think Tom, as the head of a big department, should either study regularly or ________ his job.
Mike was usually so careful, ________ this time he made a small mistake.
At school, some students are active ________some are shy, yet they can be good friends with one another.
Leave your key with your neighbor ________ you lock yourself out one day.