Both Class 3 and our class won't be able to finish the work unless they ___ each other.
A simple 45-minute operation __________ by scientists is hoped to cure blindness in six years.
__________ in a well-known university is what every-body wishes for.
Taking physical exercise regularly is an effective way to avoid __________ with the flu.
—Is there any possibility of the film __________ in Paris International Festival? —Not in the least, because the audience generally think little of it. 【选项 】
__________ three times in a row, the boxer decided to give up fighting.