51.They have door __________ door service.
[A] They have door to door service.
52.You can see __________ miles from here.
[C] You can see for miles from here.
53.Two o'clock is __________ one o'clock.
[B] Two o'clock is after one o'clock.
54.The party will last __________ 10 o'clock.
[D] The party will last until 10 o'clock.
55.He always arrives __________ time.
[C] He always arrives on time.
56.It was __________ evening when she called.
[B] It was before evening when she called.
57.Please come __________ the living room.
[A] Please come into the living room.
58.I started drinking when I was __________ 16.
[C] I started drinking when I was under 16.
59.He is coming __________ Monday.
[A] He is coming on Monday.
60. We are studying __________ present.
[D] We are studying at present.