I （）since seven this morning.
A: had typed
B: typed
C: am typing
D: have been typing
A: had typed
B: typed
C: am typing
D: have been typing
举一反三
- I‘m going to have my letters__________tomorrow． A: type B: typing C: typed D: to be typed
- Who are you going to have this letter _____ for you? My secretary. A: Type B: Typed C: been typed D: been typing
- I"m going to have my letters ______ tomorrow. A: type B: typing C: typed D: to be typed
- The secretary had no more letters ; she began to put all the letters in envelopes. A: to be typed B: typing C: to type D: typed
- The secretary will be able to help employees ______ long reports. A: type B: typed C: typing D: D．to be typed