That hero who died in the war was so brave that he never _____ to the enemies until death.
By law,when one makes a large purchase, he should have _____ opportunity to change his mind.
How long do you think it will be ________ the computer company puts forward a new product?
The famous scientist, _______ a dinner party will be held tonight,is to arrive soon.
__________twice a year, whether it is a car or bus or a truck, is the rule that every driver must obey in this city.
--- An ant has two stomachs --- one for itself, one for others. --- Really? Quite interesting. I ____ anything about it.