In much of the animal world, night is the time ________ for sleep —pure and simple.
| A．set aside | B．set down |
| C．set off | D．set up |
come
| A．college | B．collect | C．comfort | D．cloth |
Thorough
| A．northern | B．Thrill | C．though | D．without |
— You shall get an iPad so long as you come first in the speech contest.
— Is that a ________? Don’t let me down, I hope.
| A．trick | B．decision | C．promise | D．goal |
With a population of over seven million, London is ________ the largest cities of the world.
| A．between | B．among | C．from | D．of |
— I rang you up last night, but nobody answered.
— Oh, I usually ________ off my phone at about 9:00 p.m.
| A．switched | B．have switched |
| C．switch | D．had switched |