UNIT 7I. CHOOSE THE WORD OR PHRASE (A, B, C, D) THAT BEST FITS THE BLA...

21. - E 11 5 BT TRAC NGHIEM 8 UNITS
E 11 5 BT TRAC NGHIEM 8 UNITS

21. There are also limits to the amounts of petroleum, iron, silver, gold, and other limited.

A. qualities

B. numbers

C. quantities

D. totals