“You can’t get this football back ______ you agree not to kick it on my windows again”, he said angrily.
We should consider the students’ request ________ the school library provide more books on popular science.
I believe the teacher's explanation will ________this puzzling problem.
The famous artist said that his success was ________his hard work and perseverance.
________the latest estimates,insects account for probably 4 to 6 million of the species of creatures living on the planet.
The cakes are delicious. He'd like to have _______third one because ________second one is rather too small.