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.
It's still very young.
(3) Students ( must / mustn't ) walk on the grass.
It probably took you
(4) I(must / had to ) clean the classroom yesterday. -
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.
(100 Kenji ( can't have / must have ) told a lie. He is an honest boy.
