用括号里所给动词的适当形式填空。注意：每空不限一词。
小题1:He often ______________ (study) with his friends in the library after class.
小题2:We should do more exercise ________________ (keep) healthy.
小题3:These magazines must not ________________ (take) out of the reading room.
小题4:-- I called you this morning, but nobody answered it.
-- Oh, we ________________ (run) in the park.
小题5:Jacky Chen ______________ (star) in many action films for many years. I admire him very much.
