We can never expect bluer sky unless we create less polluted world.
| A．a; a | B．a; the | C．the; a | D．the; the |
—Are you in a hurry?
—No, in fact I’ve got plenty of time. I_______wait.
| A．must | B．can | C．need | D．should |
If Tom keeps practicing, he_______to make a famous singer.
| A．wants | B．hopes | C．promises | D．wishes |
I was watching the news on TV _______ the power went off.
| A．when | B．as | C．while | D．until |
Lily asked ________seco nd question before Maria could answer_______first one.
| A．the; the | B．a; a | C．a; the | D．the; a |
Three of our players were ill, and, ________, our main scorer had broken his ankle.
| A．to be honest | B．to tell the truth |
| C．as a result | D．what’s worse |