内容正文:
第三人称单数练习
1. The cat __________ a hat on its head.
a) wear
b) wore
c) wears
d) wearing
2. Tom always __________ his homework on time.
a) completes
b) completed
c) completing
d) complete
3. The birds __________ south in the winter.
a) fly
b) flying
c) flew
d) flies
4. She __________ an excellent job on her project.
a) did
b) doing
c) does
d) done
5. My dog __________ a lot of tricks.
a) knows
b) knowing
c) knew
d) know
6. The child __________ to bed early every night.
a) goes
b) going
c) went
d) go
7. John __________ the car after work.
a) washes
b) washed
c) washing
d) wash
8. The teacher __________ the students with their math problems.
a) helps
b) helped
c) help
d) helping
9. The river __________ through the valley.
a) flows
b) flowing
c) flowed
d) flow
10. Mary __________ a blue dress to the party.
a) wears
b) wearing
c) wore
d) wear
11. The baby __________ all night.
a) cries
b) crying
c) cried
d) cry
12. The company __________ a new product next year.
a) introduces
b) introducing
c) introduced
d) introduce
13. The sun __________ in the sky.
a) shines
b) shone
c) shining
d) shine
14. The boys __________ a soccer game tomorrow.
a) play
b) played
c) playing
d) plays
15. My sister __________ to music every day.
a) listens
b) listened
c) listening
d) listen
16. The police officer __________ the suspect.
a) arrests
b) arresting
c) arrested
d) arrest
17. The baby __________ when she's hungry.
a) cries
b) cried
c) crying
d) cry
18. The flowers __________ beautiful in the garden.
a) look
b) looked
c) looking
d) looks
19. Jane __________ her grandmother every weekend.
a) visits
b) visiting
c) visited
d) visit
20. The waiter __________ our orders quickly.
a) takes
b) took
c) taking
d) take
21. The students _____