Choose the suitable one. [→L.19]
(1) You( should / would ) be quiet in this room. You can talk out in the hall.
(2) I want to study abroad, so I ( must / mustn't ) study English hard.
(3) Students( must / mustn't ) walk on the grass. It's still very young.
(4) I( must / had to ) clean the classroom yesterday.
It probably took you
a long time.
(5) Must I attend the meeting tomorrow? -
No, you( don't have to / mustn't ).
(6) You are going to go swimming tomorrow, so you( should / shouldn't ) finish
your homework today.
(7) Kaori's umbrella is here. She(must have / can't have ) taken mine.
(8) I can't find my wallet in my bag. I(should have / may have ) left it at home.
(9) The party was a lot of fun. You( must have / should have ) come.
(10) Kenji ( can't have / must have ) told a lie. He is an honest boy.
