—Jane, have you finished your paper?
—No, I ________ my sister with her drawing all the morning.
| A．help | B．helped | C．was helping | D．have been helping |
—I have got a headache.
—No wonder. You __________ in front of that computer too long.
| A．work | B．are working |
| C．have been working | D．worked |
Cathy is taking notes of the grammatical rules in class at Sunshine School, where she __________ English for a year.
| A．studies | B．studied |
| C．is studying | D．has been studying |
We live day by day, but in the great things, the time of days and weeks __________ so small that a day is unimportant.
| A．is | B．are |
| C．has been | D．have been |
As the years passed, many occasions—birthdays, awards, graduations — __________ with Dad’s flowers.
| A．are marked | B．were marked |
| C．have marked | D．had marked |
Danny __________ hard for long to realize his dream and now he is popular.
| A．works | B．is working |
| C．has worked | D．worked |