-No,you______.You______toleaveuntilthebellrings.
A．mustn’t,areallowed
B．don’thaveto,aresupposed
C．needn’t,aren’tallowed
D．can’t,aren’tsupposed
In crowded places like airports and railway stations, you___ take care of your l
[单选题]You buy a gift, but you can if you want to.A． mustB． mustn'tC． have toD． don't have to
[单选题]You may use the room as you like ___ you clean it up afterwards.A． so far as B. so long asC. in caseD. even if
[单选题]_____you may have, you should gather your courage to face the challenge.A． However a serious problemB． What a serious problemC． However serious a problemD． What serious a problem
[单选题]If you ___________ in the exam, you will let your parents down.A． fall B. will fall C. fail D. will fail
Everybody does!” You need friends when you play and when you work. If you have f
Everybody does!" You need friends when you play and when you work. If you have f
[单选题]If you say to an American that you are a stranger there, most probably he will______.A． offer his helpB． stop smiling at youC． help you find the wayD． reply that he is pleased to meet you
[单选题]You should work for __________ if you become an editor of the magazine.A． just nine hours a dayB. no less than nine hours a day C. about ten hours a dayD. less than 25 hours a week
[单选题]You are a systems administrator and you are about to assign static IP addresses to various servers on your network. For the network 192.168.20.24/29 the router is assigned to the first usable host address, while the last usable host address goes to y