People’s working efficiency usually decreases more or less when the temperature _________ 35℃ or even higher.
I could hear their voice, but I couldn’t _____ what they are saying.
He was not considered for the job when they _____ choosing a new manager.
If I had taken part in the 400-meter relay race in the sports-meet, our class _____ the race.I’m _____ weight this year.
There is such a problem _____ we all should _____.
How long do you believe it will be _____ Chinese people land on the moon?