Choose the correct variant:
1. Computer hardware … be divided into four categories: input hardware, processing hardware, storage hardware, output hardware.
a) can b) may c) must
2. … I use your mobile phone?
a) can b) may c) must
3. To see and hear all these files, you … have the right plug-in.
a) have to b) can c) must
4. As Sophia Kovalevskaya’s family used to live in the village of Palibino almost all the year round, her father … invite teachers from St. Petersburg.
a) must b) were to c) had to
5. We … translate technical texts in the third year.
a) must b) have to c) are to
6. You … look through the latest magazines before you begin working.
a) must b) ought to c) are to
7. When we finish our experiment, we … make a report about it.
a) shall be able to b) can c) shall be allowed to
8. You … make experiments under the direction of a skilled instructor.
a) should b) are to c) have to
9. You … do this work at once!
a) have to b) shall c) will
10. With a well-designed CPU, you … perform highly sophisticated tasks in a very short time.
a) can b) may c) need