—I don't understand why you didn't go to the lecture yesterday afternoon.
—I'm so sorry.But I________my homework.
| A．had done | B．was doing | C．would do | D．am doing |
The US is about the same size as China, but its population is five times ____.
| A．as little | B．smaller | C．as few | D．fewer |
The number 5.12 is a special number, ______I think, that will be remembered by the Chinese forever.
| A．what | B．it | C．which | D．one |
—When did you come back?
—An hour ago. Youthe computer games.
| A．have played | B．were playing | C．played | D．had played |
As _______ unemployment is very high at the moment, it’s very difficult for people to find _______ work.
| A．the, 不填 | B．不填，不填 | C．the, a | D．an, the |
—Would you mind if I closed the window?
—______. It’s that cold outside.
| A．Sorry, I’m afraid | B．Yes, help yourself | C．Sorry, you don’t | D．No, go ahead |