I. Multiple Choice: 1.As a student, you _____ hard to please your parents. A. ought to working B. ought working C. ought to work D. ought work ______ 2.It is safe ___ medicine in locked cupboard A. putting B. to put C. put D. puts ______ 3.The children are old enough to take care of _______. A. ourselves B. himself C. myself D. themselves ______ 4.You must cover all _______ socket in your house. A. electrical B. electrify C. electricity D. electrician ______ 5.Don’t let your little brother play with ballpoint pen. They can _____ him. A. injure B. destroy C. take D. put ______ 6.It only takes one match to _____ a fire. A. cause B. destroy C. happen D. play ______ 7.You have to keep all dangerous objects ______ children’s reach. A. from B. for C. out of D. of ______ 8.____ the right side of the room, there is a window. A. On B. At C. With D. In ______ 9.Staffs _____ smoke when serving customers. A. must B. must not C. have to D. don’t have to ______ 10.Let’s paint the house _____. It will be much cheaper. A. ourself B. ourselves C. yourself D. myself ______ 11.A table with four chairs are ____ of the dining room. A.in B. the middle C. in the middle D. about ______ 12.Put the milk into the _____ to keep it from turning sour A. Shelves B. refrigerator C. stove D. oven ______ 13.It was a lovely holiday. We really ____ very much. A. enjoy ourselves B. enjoy ourself C. enjoyed ourself D. enjoyed ourselves ______ 14.He fell off his bike an injured himself. A. hurt B. destroyed C. cut D. painted ______ 15._____is a large, tall cupboard where you can hang your clothes. A. Refrigerator B. Counter C. Wardrobe D. Desk ______ 16.She used dried leaves and twigs to ____ up the hole. A. over B. cover C. paint D. coat ______ 17.I let you know as soon as I made my ______. A. decide B. decided C. decisive D. decision ______ 18.I found a picnic area down ____ the river. A. beside B. besides C. outside D. inside ______ 19.Lan lacks ______ skills because she never talks to her friends in class. A. Communicating B. communication C. communicate D. communicative ______ 20.Children always put their hands ____ the electrical socket. A. onto B. into C. in D. to