11) John has just returned from his hike, he ….. be exhausted a)must b)might c)have to
12)The weather …… be better tomorrow
a)must b)might c)have to
13) I ……. visit my grandma every week
a)must b)might c)have to
14) You ……. buy mineral water, we have plenty
a)may b)must c)needn’t
15) ……. I go with you? I am so tired
a)may b)must c)need