1. We ............ waited for 2 weeks

has

Have

are

were

2. He ............ traveled to Italy since 2001

is

has

have

was

3. Sara has ........... pizza

eat

eaten

ate

eats

4. John& Liza have............ English for 2 years

teach

taught

teached

teaching

5. They have............ for 8 hours

sleeped

sleeps

slept

sleeping

6. The car has ...........

stopping

stops

stopped

stop