directions:complete each sentence with the right modals.choose from the modals inside the box.
could must can't mustn't can
1.children ____ obey their parents.
2. _____ I borrow your pen for a moment, please?
3.you _____ take a photos in the museum . they're really strict about it.
4.you ____ wear a seatbelt when you drive.
5.they _____ still be waiting for us.
6. _____i sit beside you?
7.sorry,you _____ _____ use this chair.
8.ma'am ______ i go to the bathroom?
9.he _____ be lost.
10.children _____ tell lies.it's very naughty.
11.you _____ wear the uniform at all times.
12.they _____ go to the party this afternoon.
13.you _____ enter the school gate without an ID.
14.we ______ wear a facemask when we go outside.
15.stop,they _____ hear what we ar saying.​