18.---I can’t recite the poem. ---Well, you are supposed _____ it many times yesterday evening.
.-Jenny, let’s go to the party tonight.-_______ I have a lot of homework to do.
.He worked day and night, and therefore he _______ buy the sports car.
._______ something to eat, they began to look for something to drink.
.If you try your best to study, I think it quite _____that you will catch up with other students.
.In _______ summer of 1963 Martin Luther King Jr. gave _______ speech to many black people.