.
---- Ricky, why hasn’t Billy been with us these days?
---- Oh, he is _________for next month’s 400m race.
| A．standing out | B．taking up | C．backing out | D．working out |
．-----Tommy is planning to buy a car.
----I know .By next month, he______ enough for a used one.
| A． saves | B．saved | C．will save | D．will have saved |
In the last few years thousands of films all over the word.
A .have produced B. have been produced
C. are producing D. are being produced
I'll go to the library as soon as I finish what I .
| A．was doing | B．am doing | C．have done | D．had been doing |
Tomin the library every night over the last three months.
| A．works | B．worked |
| C．have been working | D．had been working |
—Bob has gone to California.
—Oh, can you tell me when he ?
| A．has left | B．left | C．is leaving | D．would leave |