只可以填in on at!

She likes to wake up early __IN___ the morning.
They always have assembly ___ON_______ Monday mornings.
The postman delivers letters ______IN____the afternoons.
The birds come back to the tree _____IN_____ the evenings.
The children go to bed ____AT______ nine o’clock.
The thief steals ______AT____ night.
The teacher comes to school ___AT_______ 7:00a.m.
The car exhibition is _____IN_____ July.
We celebrate Chinese New Year ___IN_______ spring.
Christmas this year will be _______ON___ a Sunday.
The war started ____IN______ 1960.
We usually go to swim ______IN____ summer.
The dinner will start _______AI___ half past six.
___IN_______ Friday nights, we stay up a bit later to watch television.
Mary has not a swimming lesson _____ON_____ that day.

She likes to wake up early in the morning.
They always have assembly on Monday mornings.
The postman delivers letters in the afternoons.
The birds come back to the tree in the evenings.
The children go to bed at nine o’clock.
The thief steals at night.
The teacher comes to school at 7:00a.m.
The car exhibition is in July.
We celebrate Chinese New Year in spring.
Christmas this year will be on a Sunday.
The war started in 1960.
We usually go to swim in summer.
The dinner will start at half past six
On Friday nights, we stay up a bit later to watch television.
Mary has not a swimming lesson on that day.

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She likes to wake up early __in___ the morning.
They always have assembly ____on______ Monday mornings.
The postman delivers letters ____in______the afternoons.
The birds come back to the tree _____in_____ the evenings.
The children go to bed ___at_______ nine o’clock.
The thief steals _____at_____ night.
The teacher comes to school _____at_____ 7:00a.m.
The car exhibition is _____at_____ July.
We celebrate Chinese New Year ____in______ spring.
Christmas this year will be ____on______ a Sunday.
The war started _____in_____ 1960.
We usually go to swim ____in______ summer.
The dinner will start ____at______ half past six.
___On_______ Friday nights, we stay up a bit later to watch television.
Mary has not a swimming lesson _____on_____ that day.

She likes to wake up early ___in__ the morning.
They always have assembly ____on______ Monday mornings.
The postman delivers letters ______in____the afternoons.
The birds come back to the tree ____in______ the evenings.
The children go to bed ___at_______ nine o’clock.
The thief steals _____at_____ night.
The teacher comes to school _____at_____ 7:00a.m.
The car exhibition is ____in______ July.
We celebrate Chinese New Year ____in______ spring.
Christmas this year will be ___on_______ a Sunday.
The war started _____in_____ 1960.
We usually go to swim ____in______ summer.
The dinner will start ____at______ half past six.
_____On_____ Friday nights, we stay up a bit later to watch television.

2008-02-07 19:15:13 補充：
Mary has not a swimming lesson _____on_____ that day.

She likes to wake up early _in____ the morning.
They always have assembly ____in______ Monday mornings.
The postman delivers letters ____in______the afternoons.
The birds come back to the tree ___in_______ the evenings.
The children go to bed ____at______ nine o’clock.
The thief steals ___at_______ night.
The teacher comes to school ____at______ 7:00a.m.
The car exhibition is ____in______ July.
We celebrate Chinese New Year _____in_____ spring.

Christmas this year will be __on________ a Sunday.
The war started _____at_____ 1960.
We usually go to swim ___in_______ summer.
The dinner will start _____at_____ half past six.
____At______ Friday nights, we stay up a bit later to watch television.
Mary has not a swimming lesson ___on_______ that day.