Fill in the blanks with the necessary forms of Modal Verbs:
(couldn’t, may, needn’t, am, should, must, have, be able)
1. I can’t go with them as I ... to be at the Institute at half past nine. 2. If you want
to understand this phenomenon better, you ... to look through some articles devoted to
this problem. 3. I . . . help you yesterday as I came very late from the Institute. 4. You
. . . understand now that it is necessary to do everything in time. 5. If you want, you . .
. read this article. 6. If you come earlier, I’ll... to help you. 7. All the students of our
Institute . . . carry out a number of experiments in analytical laboratory. 8. He managed
to finish his experiment yesterday, I think he ... come to the lab today.