A good teacher must be able to hold his students’ attention ____ he reaches the end of the class.
| A．when | B．after | C．until | D．unless |
______ you understand it, it’s easy for you to obey it.
| A．As soon as | B．Once | C．Unless | D．The moment |
Don't trust such people ______ praise you to your face but speak ill of you behind your back.
| A．who | B．whoever | C．that | D．as |
. Good news! We didn’t spend ______ we had expected.
| A．as half much money as | B．much money as half as |
| C．as much money as half | D．half as much money as |
---May I look at the menu for a little while?
---Of course, ______ sir.
| A．don’t worry | B．it doesn’t matter | C．enjoy yourself | D．take your time |
---I have seen so little of Mike______. Is he away on business?
---Oh, no. He just leaves for his office and returns very ______.
| A．later; lately | B．later; late | C．late; lately | D．lately; late |