THERE MAY BE A LOT OF ……… STONES IN MARS. A. PRECIOSITY B. PRECIOUS...

8/ - DE THI TIENG ANH 9 HKII2012
DE THI TIENG ANH 9 HKII2012

8/ There may be a lot of ……… stones in Mars.

a. preciosity b. preciousty c. precious d. preciousness