—Look at the triangle on the right, if AC=3 , BC=4 , how long is AB?
—It’s ______.
five
seven
twelve
Maria has _____ trouble _____ math, so she often asks her math teacher for help.
Teachers should _____ their students to practice _____ English as much as possible.
China takes the leading position _____ space industry.
I spend much money on books _____ I am not rich.
—What a nice classroom! —It _____ every day.
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