Tell me and I'll forget. Show me and I       not remember. Let me try and I'll understand.

中央加大财政转移支付力度和财政性投资力度，支持民族地区和边疆地区加快发展，内蒙古自治区迎来了新的发展机遇。内蒙古自治区要加快发展，必须(     )

①加强东西交流，实现优势互补     ②照搬澳大利亚畜牧业发展模式

③开发旅游资源，发展草原旅游业   ④走畜牧业可持续发展之路

用括号里所给动词的适当形式填空。
(1)He often ____ (study) with his friends in the library after class.
(2)We should do more exercise ____  (keep) healthy.
(3)These magazines must not ____  (take) out of the reading room.
(4)  I called you this morning, but nobody answered it.
     Oh, we ____ (run) in the park.
(5)Jacky Chen ____  (star) in many action films for many years. I admire him very much.