Answer: These are the right answers:
1. pongo
2. supongo
3. pongo
4. hago
5. salimos
6. ve
7. suponemos
8. oigo
9. sale
10. salgo
Explanation: Just to elaborate a little on the answers, it can also be added that in this exercise they are asking you to use the present tense, which is frequently used in Spanish. In order to conjugate a verb in the present tense, you have to look at the ending of that verb in infinitive. All regular verbs (which are the ones you are using here) in Spanish end in -AR, -ER or -IR. In order to form the present tense, you must leave the root of the verb, and add the following endings, according to the subject (yo, tú, and so on).
Verbs that end in -AR:
yo -o
tú -as
él/ella -a
nosotros -amos
vosotros -áis
ellos -an
VERBS that end in -ER:
-o (yo pongo, yo hago, yo supongo, for instance)
-es
-e (María Eugenia ve, for instance)
-emos (Nosotros suponemos, for instance)
-éis
en
VERBS that end in -IR:
-o (yo oigo, yo salgo, for instance)
-es
-e (sale Diego, for instance)
-imos (nosotros salimos, for instance)
-ís
-en