in 的固定词组：
(1)in English (2) in red
(3)in turn (4) in ink
(5)in return (6) in 1987
(7)in spring (8) in March
(9)in the morning (10)in line
(11)in front of (12)in the front of
(13)in a hurry (14)in need of
(15)in the tree (16)in use
(17)in the sun (18)in touch with
(19)in time (20)in no time
(21)in cash (22)in trouble
(23)in the east (24)in the end
(25)in a low voice (26)in the middle of
(27)in charge of (28)in a word
(29)in thirties (30)in one's twenties
(31)in the face (32)in the corner
(33)in surprise (34)in advance
(35)in 3 days (36)in this way
(37)in addition to
