某农田生态系统，卷叶螟和褐飞虱是稻田中两种主要害虫，拟水狼蛛是这两种害虫的天敌。下列

四、阅读理解（共16小题；每小题2分，满分32分）

LOST AND FOUND	ROOMATES
FOUND: Cat, 6 months old, black and white marking. Found near Linden and South U.Steve, 800---4661	FEMAL ROOMATE WANTED Own room near campus. Available December 1st. Rent $80 per month until March 1st.$129 there after. Call Jill for details,800—7839.
LOST: Gold wire rim glasses in brown case. Campus area. Reward. Call Gregg 800---2896	NEED PERSON to assume lease for own bedroom in apt. near campus, $92/mo. Starting Jan. 1st. Call 800---6157 after 5:00
FOR SAIL	HELP WANTED
MOVING: Must sell. TV b/w2 seconds, $50; AM/FM  transistor radio A/c or battery, $15;cassette tape recorder,$10; music records.Call John or Pat, 800—0739 after 5 or weekends.	BABYSITTER-MY HOME If you are available a few hours during the day, some evenings and occasional weekends to care for 2 school-age children, please call Gayle Moore days 800—1111, evenings and weekends 800—4964.
USED FUR COATS and JACKETS GOOD CONDITION. $50---¥125. Call 800---0436 after 12 noon.	WAITRESS WANTED: 10 a.m.—2 p.m. or 10:30 a.m.---5 p.m. Apply in person, 207 s. Mai.Curtis Restaurant.

 
48. If you want a job of taking care of children, which ad will you answer?
A.LOST AND FOUND   B. ROOMMATES   C. FOR SAIL    D.HELP WANTED
49. You will call____ if you want to buy a radio.
A. 800---0436    B. 800—0739   C.800—4661  D.800—4964
50. If your aunt wants to rent a room from Feb.1st to Apri.1st, how much money should she pay?
A. $160  B. $ 129  C. $ 209  D. $418