When astronauts return to the earth’s atmosphere, helicopters fly to________they would land, ready to collect them

The course normally attracts 20 students per year, _______ up to half will be from abroad[ ]

The charity show was very successful with the help of all the classmates, just as the old saying goes, “_______.”

Had he not been so busy taking the diamonds, he _________ the blow.[ ]

Is this the reason ______ at the meeting for his carelessness in his work? [ ]