13. After receiving a brand-new model car, the little boy’s____face broke into radiantsmiles.(A)prim
14. The roof of this mansion has been____designed to provide solar heating, whichhelps save a signif
15. The opposition party accused the government of leaking confidential information to the media to_
17. Before a new invention is mass-produced and put on the market, the manufacturer will make a surv
18. The principal is____in a meeting with the officials from Ministry of Education.Would you like to