Your car should be ready by 12 o’clock, but ___, I’ll let you know.
It is reported that ________ adopted children want to know who their natural parents are
Few pleasures can equal ________ of a cool drink on a hot day
By , production in the area is expected to double ________ of
代词:人称、物主、反/自身、指示、相互、疑问、不定代词As they were classmates, ________ was no wonder that they should do the work in the same way
It took us ________ to finish the experiment on the monkey