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练习题

for，since，from的区别 for, since, from – what’s the difference?
1 He had improved a lot _____ the start of the season.
A.from
B.since
C.for
2 Everything will be cheaper _____ 9 o'clock tomorrow.
A.from
B.since
C.for
3 I've had this watch _____ 25 years.
A.from
B.since
C.for
4 We travelled to Italy _____ 20 to 25 July.
A.from
B.since
C.for
5 I haven't seen her _____ the last meeting.
A.from
B.since
C.for
6 I had to sit _____ a few minutes to rest my legs.
A. from
B.since
C. for
7 We haven't talked to them _____ they got married.
A.from
B. since
C.for
8 The concert started at 8 but the doors were open _____ 6:30.
A.from
B.since
C.for
9 We've been walking _____ six hours.
A.from
B.since
C.for
10 We've been working very hard _____ the beginning of January.
A.from
B.since
C.for
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